New York Washington

8 nonstop pairs · 12 nonstop airlines · 647 nonstop flights/week

Four airlines cover New York to Washington across six airport pairs, and nearly every plane on the route is a regional jet. The whole corridor lands in under two hours.

If you are connecting through Reagan National, JetBlue out of JFK is the pick. It runs hourly, and the A220 is a real narrowbody with wider seats and more overhead space than the Embraer 175s and CRJ-900s everyone else flies here. From LaGuardia, American and Delta both run hourly to Reagan on regional jets with no difference between them. From Newark, United operates to Reagan several times a day.

If you are not connecting and your trip is city center to city center, take the Amtrak Acela from Penn Station. About three hours to Union Station. A flight looks faster on paper, but once you add the airport on each end, door-to-door runs four to five hours. The train is less hassle for about the same travel time.

If your connection is through Dulles, United flies from Newark and LaGuardia, and Delta covers it from JFK. The Newark to Dulles pairing is where United sometimes puts a 737 instead of a regional jet, so pick that if a bigger plane matters to you.

Reagan National has a Metro station inside the terminal. Dulles has the Silver Line, but that ride is close to an hour into the city. If you are choosing between a Reagan fare and a Dulles fare and the price gap is small, Reagan saves you time on the ground.

Have a specific need? Use the decision guide below to filter by your airline, where you live, lounges, or where you're staying in Washington.

Best Overall
JFK DCA
3 airlines 215/wk 1h 37m
31% on-time
Delta Air Lines, JetBlue, American Airlines. Also bookable via Alaska Airlines. JetBlue JFK to Reagan National on the A220, the only full-size aircraft among regional jets.
Explore JFK → DCA
Strong Alternative
EWR → IAD
1 airline · 92/wk · 1h 23m
United Airlines. Also bookable via GoJet Airlines, GXA, MTN +1 more. LaGuardia to Reagan National on American or Delta cuts the airport drive from Manhattan but puts you on a smaller regional jet with tighter overhead bins.
77%
Newark → Washington 1 airline · 97/wk · 1h23m · United only from Newark to Reagan National, fewer daily flights than from LaGuardia or JFK. Good New York → Washington 2 airlines · 96/wk · 1h30m · American and Delta from LaGuardia, roughly every 30 minutes on weekday mornings, all regional jets. Good New York → Dulles 1 airline · 95/wk · 1h48m · Delta only on regional jets, the farthest airport combination for anyone starting in central Manhattan. Good New York → Dulles 1 airline · 49/wk · 1h26m · United from LaGuardia to Dulles, about ten flights daily, useful for westbound connections through United. Good Newark → Baltimore 3 airlines · 2/wk · 1h03m · No scheduled passenger flights between Newark and BWI. The listed service is cargo, not commercial air travel. Limited New York → Baltimore 2 airlines · 1/wk · 1h05m Sparse
Nearby cities with nonstop service
~101mi Hartford → Dulles 12 airlines · 193/wk Nearby ~60mi Philadelphia → Dulles 21 airlines · 115/wk Nearby ~40mi Islip → Baltimore 7 airlines · 41/wk Nearby ~22mi White Plains → Washington 28 airlines · 34/wk Nearby ~104mi Wilkes-Barre/Scranton → Dulles 2 airlines · 14/wk Nearby ~11mi Teterboro → Dulles 47 airlines · 12/wk Nearby
Nearby cities · connections only
~61mi New Haven No nonstop to Washington Connecting ~83mi Allentown/Bethlehem No nonstop to Washington Connecting ~99mi Atlantic City No nonstop to Washington Connecting

Pick What Matters to You

Show me the best pair for...

Best pair by where you're coming from

Your location determines which airport is closest and most convenient.
Manhattan (Midtown and Below) Best
JFK via AirTrain and subway or LIRR from Jamaica, 60 to 75 minutes total. Newark is faster from Penn Station: NJ Transit takes around 25 minutes. Both airports have nonstop international service.
Brooklyn Best
JFK is the closer airport. The drive is 30 to 50 minutes depending on Belt Parkway traffic. A train to Howard Beach, then AirTrain to the terminal. Newark adds a river crossing and at least 20 extra minutes.
Queens Best
JFK is in Queens. Depending on your neighborhood, the drive is 15 to 30 minutes. The easiest airport connection in the metro area.
Northern New Jersey Best
Newark. No question. I-78, I-95, or the Garden State Parkway depending on direction. No river crossings, no city traffic.
The Bronx Flexible
Both airports are roughly equidistant and neither is convenient. JFK requires subway transfers. Newark means getting to Penn Station first. Budget extra time from the Bronx either way.
Westchester and North of the City Good
Newark via I-287 avoids Manhattan entirely. JFK means driving through the Bronx or taking Metro-North to Penn for the subway connection. Newark is the better call from most of Westchester.
For most New York-area travelers, JFK → DCA is the default.4 airlines, 215 flights/wk.
Explore JFK → DCA

Best pair by where you're staying in Washington

Your Washington airport matters as much as your New York airport.
Downtown DC and K Street Best
The business and lobbying district. Reagan National is 15 minutes by Metro on the Blue or Yellow line. Most business hotels sit within walking distance of a Metro station.
Capitol Hill and Union Station Good
If your meeting is on the Hill, the Acela to Union Station drops you there directly. By air, Reagan National connects via the Blue line in about 20 minutes.
Georgetown Good
No Metro station in Georgetown. Rideshare from Reagan National takes about 15 minutes. Foggy Bottom Metro is a 20-minute walk from the center of Georgetown.
Tysons Corner and Reston Tradeoff
Government contractors and tech offices in Northern Virginia. Dulles is 15 minutes away by car. Reagan National is 30 to 45 minutes depending on traffic. If you are heading here, fly into Dulles.
Arlington and Crystal City Best
Pentagon, defense offices, and an expanding hotel district. Reagan National is walking distance from Crystal City. Some hotels are a five-minute walk from the terminal.
Bethesda and NIH Tradeoff
North of the city in Maryland. No airport is particularly close. Reagan National connects via Metro with a transfer on the Red line, about 40 minutes total. The Acela to Union Station and Metro from there takes about the same time.
DCA is the right Washington airport for most travelers.Check individual route pages for ground transport from DCA.
Explore JFK → DCA

Which pair your airline flies nonstop

Loyalty programs drive airport choice for frequent flyers. Here's where each airline operates.
AirlineJFK–DCAEWR–IADEWR–DCALGA–DCA
United Airlines
CHG
GoJet Airlines
Delta Air Lines
MTN
GXA
La Compagnie
JetBlue
British Airways
Southwest Airlines
Alaska Airlines
American Airlines
Most airlines fly JFK → DCA.4 airlines serve multiple pairs.
Explore JFK → DCA

Ranked by on-time performance

On-time = departing within 15 min of schedule. Higher competition tends to keep airlines punctual.
JFK → DCA #1
31% on-time. 4 airlines competing means schedule padding is tight and delays get absorbed.
EWR → IAD
77% on-time. 5 airlines competing.
EWR → DCA
77% on-time. 2 airlines competing.
LGA → DCA
44% on-time. 2 airlines competing.
JFK → IAD
31% on-time. 3 airlines competing.
EWR → BWI
77% on-time. 3 airlines competing.
LGA → IAD
44% on-time. 2 airlines competing.
1 other pair
Insufficient data — 1 flight/week doesn't generate meaningful OTP stats.
JFK → DCA has a 31% on-time record.High competition keeps airlines punctual.
Explore JFK → DCA

Lounge access by airport and terminal

Premium lounge access varies dramatically by terminal. This alone can determine airport choice for some travelers.
Terminal B Lounges Good
The rebuilt Terminal B has airline club lounges with seating, Wi-Fi, drinks, and light food. Access through airline loyalty programs or eligible credit cards. The new terminal makes the lounge experience better than what LaGuardia used to offer, which was close to nothing.
Terminal C Lounges Good
Club lounges in Terminal C for eligible passengers. Same access rules: airline status, credit card membership, or a same-day qualifying ticket. Quality is standard domestic lounge level.
Gate Areas
The rebuilt terminals have better gate seating, charging outlets, and food options than the old LaGuardia. On a short domestic flight, the gate area is fine. Spend the lounge walk-in fee on dinner at the destination instead.
JFK T4 Centurion Lounge Top Tier
American Express Platinum or Centurion cardholders. Cocktail bar, sit-down dining, showers. One of the better Centurion locations. Access is card-based regardless of airline.
JFK T4 Delta Sky Club Good
Large club with runway views, full bar, and hot food. Gets crowded during the evening international push. Delta One and SkyMiles status get you in; everyone else needs a same-day Delta boarding pass plus a qualifying credit card.
JFK T8 Flagship Lounge Top Tier
American and British Airways premium cabin passengers. Quieter than T4, with showers and a dining room. BA passengers flying Club Suite have access here before JFK to Heathrow flights.
JFK T5 JetBlue Mint Lounge Good
Open to Mint passengers on JetBlue. Smaller than the legacy carrier clubs but less crowded. Food and drinks included. The terminal itself has decent food options if the lounge is full.
JFK T1 International Lounges Good
A collection of carrier-specific lounges including Turkish, Air France, and Korean Air. Quality varies. The Turkish lounge is a standout if you have access.
EWR Terminal C Polaris Lounge Top Tier
United Polaris passengers and Star Alliance business class. Full sit-down restaurant with table service, shower suites, daybeds, and a cocktail bar. One of the best airline lounges in North America. If you are flying United Polaris business class, arrive early and use it.
EWR Terminal C United Club Good
Standard United Club with hot food, bar, and seating. Multiple locations in Terminal C. Gets crowded during the evening departure wave. United Club membership, Star Alliance Gold, or certain credit cards get you in.
EWR Terminal A Lounges Good
The rebuilt Terminal A has fresh lounge space. Carrier-specific lounges are still filling in. The terminal itself is well-designed with better food options than the old building.
American Airlines Admirals Club Good
Standard Admirals Club with drinks, Wi-Fi, and a quieter space than the gate area. Open to Admirals Club members, OneWorld Sapphire and Emerald, and premium cabin passengers.
United Club Good
Smaller than the locations at Dulles. Open to United Club members, Star Alliance Gold, and premium ticket holders. Adequate for a short wait between flights.
Capital One Lounge Good
Open to Capital One Venture X cardholders. Better food and design than the airline clubs. Popular because credit card access fills it up, so expect a wait during peak hours.
United Polaris Lounge Top Tier
One of United's best lounges. Sit-down dining, shower suites, and daybeds in a calm space. Open to United and Star Alliance business class passengers on long-haul itineraries. The food quality is a step above standard lounge fare.
United Club (multiple locations) Good
Several United Club locations across the concourses. Standard setup with drinks, snacks, and seating. Can get crowded during the afternoon and evening departure banks. Open to members, Star Alliance Gold, and premium cabin passengers.
Virgin Atlantic Clubhouse Good
A smaller, well-designed space with a bar and hot food. Open to Upper Class passengers and select Virgin Atlantic loyalty members. A different feel from the larger United lounges.
British Airways Lounge Good
Serves Club World and First passengers along with OneWorld Emerald and Sapphire members. Quieter than the United options during off-peak times. Standard British Airways catering with a self-service bar.
Your airline and cabin class determine which lounges you can access.Check route pages for terminal assignments.
Explore JFK → DCA

Ranked by flights per week

More flights = more flexibility. Miss your flight, catch the next one. Schedule depth is insurance.
JFK → DCA #1
215/wk (~31/day) — 4 airlines. A departure roughly every 47 minutes at peak.
EWR → IAD
92/wk (~13/day) — 5 airlines.
EWR → DCA
97/wk (~14/day) — 2 airlines.
LGA → DCA
96/wk (~14/day) — 2 airlines.
JFK → IAD
95/wk (~14/day) — 3 airlines.
EWR → BWI
2/wk (~0/day) — 3 airlines.
LGA → IAD
49/wk (~7/day) — 2 airlines.
1 other
1/wk each. Not viable for flexible travel planning.
JFK → DCA: 215 flights/week.Miss one flight, wait 47 min for the next.
Explore JFK → DCA

Getting to the airport

Cost and time vary by mode. Train is more predictable than driving.
Taxi or Rideshare Best
From midtown Manhattan, 20 to 30 minutes depending on traffic. Around $30 to $40 by taxi. The Grand Central Parkway connects directly. Morning rush into the city and evening rush out are the times to avoid.
Q70 SBS Bus to Subway Good
Runs from all LaGuardia terminals to the Jackson Heights subway hub in about 10 minutes. Transfer to the 7, E, F, M, or R train for Manhattan, Brooklyn, or Queens. The cheapest way to the airport from anywhere with a subway connection.
M60 SBS Bus Flexible
Runs across 125th Street in Manhattan to LaGuardia, connecting to the A, B, C, and D trains and Metro-North at Harlem-125th Street. Useful from the Upper West Side, Harlem, or the Bronx. Around 40 to 50 minutes from the West Side.
Driving and Parking Flexible
No rail link to LaGuardia. If you drive, parking runs around $40 per day in the terminal garages. Cell phone lots are free for pickup. The airport is compact enough that the walk from parking to gates stays short.
AirTrain + LIRR Best
AirTrain to Jamaica Station, then Long Island Rail Road to Penn Station in around 20 minutes. Faster and more comfortable than the subway, and you avoid dragging luggage underground. This is the best option for midtown Manhattan.
AirTrain + Subway Value
AirTrain to Jamaica or Howard Beach, then the E or A train into Manhattan. Total time is 60 to 75 minutes. Cheap but slow, and dragging luggage through the subway at rush hour is miserable.
Taxi Flexible
Flat rate of around $110 from JFK to anywhere in Manhattan, plus tolls and tip. Predictable pricing but travel time depends entirely on traffic. The Van Wyck Expressway can turn a 40-minute ride into 90 minutes during rush hour.
Car Service / Black Car
Pre-booked car services run around $70 to $100 depending on vehicle type. No flat-rate guarantee like yellow cabs, but you get a driver waiting at arrivals. Worth it if you are landing late or have a lot of luggage.
NJ Transit from Penn Station Best
Train from New York Penn Station to Newark Airport station in around 25 minutes, then AirTrain to your terminal. Frequent service, cheap, and immune to tunnel traffic. The most reliable way to get to Newark from Manhattan.
Taxi / Rideshare Flexible
No flat rate from Manhattan to Newark. Expect around $60 to $90 depending on traffic and tolls. The Lincoln Tunnel and NJ Turnpike can double your travel time during rush hour. Fine on weekends or off-peak.
Newark Airport Express Bus Value
Bus service from midtown Manhattan (Port Authority, Bryant Park, Grand Central) to all terminals. Takes 40 to 60 minutes depending on traffic. Around $19 one way. A budget option if you are not in a rush.
Car from New Jersey
If you live in northern New Jersey, the drive is straightforward. I-78, I-95, or the Garden State Parkway depending on your direction. Parking is expensive long-term. Cell phone lots exist for pickup.
Weigh transit time against schedule flexibility.A faster airport with fewer flights may not save you time overall.
Explore JFK → DCA

Red-eye vs daytime departures

Departure timing affects jet lag, hotel costs, and how you spend your first day.
No red-eye on this route
Flights between New York and Washington are under two hours with no overnight departures.
JFK → DCA has the most departure options.Check the route page for schedule details.
Explore JFK → DCA

Premium cabin options

Business and first class products on this route, ranked by value and quality.
JetBlue A220 Even More Space Best
JetBlue flies A220s from JFK to Reagan National. Even More Space seats in the front of the cabin offer around 34 inches of pitch and wider seats than anything else between these two cities. The A220 cabin is noticeably quieter than the regional jets. There is no first class, but the extra-legroom seats are the most comfortable option on this route.
United 737 First Class (Newark to Dulles) Good
United runs some 737s between Newark and Dulles. First class on the 737 has standard domestic recliner seats, a real step up from regional jet first class. This is the only pairing where you can get a non-regional aircraft with a traditional first class cabin.
Regional Jet First Class Flexible
Delta, American, and United all sell first class on their E175s and CRJ-900s. The seats are slightly wider with more legroom, but the cabins are small and overhead bins are tight. On a 90-minute flight, the upgrade gets you priority boarding, a drink, and a snack. The main value is guaranteed overhead bin space on planes where bins fill fast.
Check route pages for cabin details per airline.Business class products vary significantly between carriers.
Explore JFK → DCA

Connecting through New York from a domestic flight

Flying between New York and Washington makes the most sense when one end is a connection. Reagan National feeds American and Delta hubs across the country. Dulles feeds United's domestic and international network. JFK and Newark handle international connections on the New York side. If both legs of your trip start and end in the cities themselves, the Acela from Penn Station to Union Station is faster than any itinerary through an airport.

Arriving LGA Best
Book LGA → DCA. Same airport, no ground transport needed. 2 airlines, 96/wk.
Arriving JFK Best
Book JFK → DCA. Same airport, no ground transport needed. 4 airlines, 215/wk.
Arriving EWR Best
Book EWR → IAD. Same airport, no ground transport needed. 5 airlines, 92/wk.
Self-connecting
Avoid cross-airport transfers. No direct transit links between most metro airports. Budget 4+ hours minimum if you must.
Check which New York airport your domestic flight arrives at, then book Washington from that same airport.JFK arrivals → JFK–DCA · EWR arrivals → EWR–IAD
JFK → DCA

New York & Washington Airport Profiles

Each airport has a personality. Terminal quality, transit access, lounge scene, and crowd levels vary dramatically — sometimes more than the flight itself.

JFK John F. Kennedy International Airport Primary

JFK spreads across four active passenger terminals connected by the AirTrain, and walking between them is not an option. Terminal 1 is the old international building. Terminal 4 is the largest, handling most international carriers. Terminal 5 is the former TWA terminal, now JetBlue's home, with the mid-century curves still intact. Terminal 8 belongs to American and British Airways.

The terminal you depart from depends entirely on your airline. Security wait times vary between them. Terminal 4 tends to be the slowest during evening international departures. Terminal 8 has improved since the co-location of its two main carriers. The TWA Hotel sits adjacent to Terminal 5 if you need to sleep before an early departure or after a late arrival.

JFK feels enormous because it is. Budget extra time for the AirTrain if you are connecting between terminals or arriving by subway. The AirTrain loop takes 10 to 15 minutes end to end.

Washington Pairs
2
DCA, IAD
Airlines
7
Flights/Week
310
EWR Newark Liberty International Airport Secondary

Newark Liberty has three terminals, and Terminal A opened as a full rebuild in 2023. The old Terminal A was demolished and replaced, and the difference is dramatic. Terminal C is United's hub, massive and busy, with most international flights departing from here. Terminal B handles most other carriers.

The AirTrain connects all three terminals and the NJ Transit / Amtrak rail station. Unlike JFK, the terminals are closer together and the AirTrain loop is faster. Security at Terminal C can back up during afternoon and evening international departures.

The airport sits in New Jersey, around 10 miles from Manhattan. That proximity is deceptive because the drive crosses the Hudson via the Newark Bay or Lincoln Tunnel, and both can be brutal during peak hours. NJ Transit from Penn Station is the more reliable option.

Washington Pairs
3
IAD, DCA, BWI
Airlines
10
Flights/Week
191
LGA LaGuardia Airport Secondary

LaGuardia is the New York airport that does not pretend to be anything more than a domestic terminal. No international flights, no customs hall, no transatlantic gates competing for security lane capacity. The result is a faster, simpler airport experience than JFK or Newark for any flight that stays in the country. Eight miles from midtown Manhattan, it is also the closest major airport to the city center.

The rebuilt Terminal B replaced what was widely considered the worst major terminal in the country. The new building is bright and open, with real restaurants instead of the food court that used to define LaGuardia dining. Gates connect via an elevated pedestrian bridge with a clear sightline to the Manhattan skyline. Terminal C is equally compact. Neither terminal is large, and gate-to-gate walks stay under ten minutes.

Washington Pairs
3
DCA, IAD, BWI
Airlines
6
Flights/Week
146
DCA Ronald Reagan Washington National Airport Primary

Reagan National sits on the Potomac River, five miles from the National Mall, with monument views on approach. The airport is compact. Terminals B and C handle most traffic, and the walk from security to any gate rarely takes more than ten minutes.

A Metro station connects directly to the terminals on the Blue and Yellow lines. The feel is of a well-run regional airport: shorter concourses, quicker security, and less distance to cover than the area's larger airports. Terminal C has been modernized with better food and more natural light.

New York Pairs
3
JFK + EWR + LGA
Nonstop from New York
408/wk
Into Washington
12 min
Metro
IAD Washington Dulles International Airport Secondary

Dulles sits 27 miles west of downtown Washington in the Virginia suburbs, connected to the city by the Silver Line Metro. The Saarinen-designed main terminal is the building on every postcard, but most gates are in the midfield concourses reached by the AeroTrain people mover.

Walking distances between concourses can be long. If you have a tight connection, check which concourse your gate is in before landing. Security lines can build during the late afternoon departure rush, but TSA PreCheck and Clear lanes move faster.

New York Pairs
3
EWR + JFK + LGA
Nonstop from New York
236/wk
Into Washington
50 min
Metro
BWI Baltimore/Washington International Thurgood Marshall Airport Limited Service

BWI sits between Baltimore and Washington, 32 miles from downtown DC and about 10 miles from downtown Baltimore. The airport has a single terminal building divided into concourses A through E, with a straightforward layout that keeps walking distances short.

The terminal is functional rather than flashy. Security checkpoints tend to move faster than at the larger DC-area airports, and the concourses rarely feel overcrowded. A free shuttle bus connects the terminal to the BWI rail station for MARC and Amtrak service.

No high-frequency connections found. Check BWI routes for all options.

Full Comparison

Every airport combination ranked by schedule depth. JFK–DCA carries 33% of weekly flights with the best on-time record. EWR–IAD adds another 14%. The remaining 6 pairs share 53% between them.

RouteAirlinesFlights/WkShareDurationOTP
JFK → DCA 3 215
1h 37m 31% Explore →
EWR → IAD 1 92
1h 23m 77% Explore →
EWR → DCA 1 97
1h 23m 77% Explore →
LGA → DCA 2 96
1h 30m 44% Explore →
JFK → IAD 1 95
1h 48m 31% Explore →
EWR → BWI 3 2
1h 03m 77% Explore →
LGA → IAD 1 49
1h 26m 44% Explore →
LGA → BWI 2 1 1h 05m 44% Explore →

Which Airlines Fly Which Pairs

American Airlines and Delta Air Lines serve both JFK and LGA to DCA — airport flexibility on the New York side.

Not all planes are the same size. The aircraft type below each checkmark tells you whether you are getting a widebody (777, 787, A350) with wider seats and a quieter ride, or a narrowbody (737, A321) with a single aisle. On flights over five hours, the difference is significant.

JFK–DCA
EWR–IAD
EWR–DCA
LGA–DCA
American Airlines

E175

E175
JetBlue

A220-300
Delta Air Lines

E175

757-200

A220-300, CRJ-900
United Airlines

737-900, 777-200

CR5, CR7
Alaska Airlines (codeshare)

E175
GoJet Airlines (codeshare)

CR7
GXA (codeshare)

A320
MTN (codeshare)

C208

Route Facts

Total Nonstops
647/wk
Across 8 pairs
Airlines
12
4 on JFK–DCA
Fastest Pair
1h 37m
JFK → DCA
Distance
214 mi
344 km
New York
3 airports
LGA, JFK, EWR
Washington
3 airports
DCA, IAD, BWI
Best OTP
77%
EWR → IAD

Frequently Asked Questions

Common questions about New York to Washington flights.
Two reasons: you are connecting through a United hub, or your destination is in Northern Virginia near Tysons Corner or Reston. Dulles is 26 miles west of downtown DC. The Silver Line Metro reaches it but the ride into central Washington takes close to an hour. Reagan National is four miles from the Capitol with a 15-minute Metro ride to the Mall. If your meeting is anywhere in DC proper, fly into Reagan National.
Take the Metro from the station inside the terminal. Blue and Yellow line trains reach downtown DC stations in about 15 minutes. A rideshare takes about the same time outside rush hour but can stretch to 30 minutes during peaks. The Metro is the more reliable option.
Flights leave throughout the day, with the highest frequency on weekday mornings between 6 and 9 AM and again on Sunday evenings. LaGuardia to Reagan National runs roughly every 30 minutes during morning peaks. JFK to Reagan National has flights spread across the day from JetBlue, Delta, and American. United runs the Newark side on its own schedules to both Reagan National and Dulles.
The A220 is a full-size single-aisle aircraft with wider seats, larger windows, and overhead bins that fit a standard carry-on. Every other carrier flies regional jets with smaller cabins and limited overhead space. If you have a roller bag and prefer not to gate-check it, the JetBlue A220 from JFK is the better plane. The tradeoff is that JFK is farther from Manhattan than LaGuardia.
Basic economy fares can undercut Acela business class, but add the cost of getting to and from the airport on both ends and flying rarely saves money. The Acela drops you at Union Station in central DC. A flight drops you at an airport that still requires a cab or rideshare into the city.
Yes. Fly out on a 6 or 7 AM departure from LaGuardia or JFK and land at Reagan National before 9. Return flights run throughout the afternoon and evening. The Acela works for same-day trips too, with the advantage of Union Station being walkable to Capitol Hill and the Mall.
Driving the I-95 takes about four hours without traffic and five or more with it. Budget buses run the route for around $20 to $30 but take four to five hours. The Acela is three hours with no traffic risk and you can work the entire way. Driving only wins if you need a car once you arrive.