Washington to Boston (DCA–BOS) — Airlines, Schedules & Connections

DCA Airport Page →
398 mi airlines 342/wk
On-time Some delays Frequent delays
Flight Schedule 112 flights Verified 40m ago
Nonstop 1-Stop 2-Stop Hide separate tickets Hide overnight
  Flight Airline AC Dep Arr Dur OTP Sched  
DL5710
DL Delta
E75
6:00 AM
EDT T2
7:37 AM
EDT
1h 37m
M T W T F S S
Prices
DL5698
DL Delta
E75
7:00 AM
EDT T2
8:38 AM
EDT
1h 38m
M T W T F S S
Prices
AA4455
AA American
E75S
7:10 AM
EDT T2
8:55 AM
EDT
1h 45m
M T W T F S S
Prices
FI7824
FI Icelandair
223
7:20 AM
EDT T2
8:48 AM
EDT
1h 28m
M T W T F S S
Prices
B61154
B6 JetBlue
BCS3
7:20 AM
EDT T2
8:48 AM
EDT
1h 28m
M T W T F S S
Prices
AA4379
AA American
E75
7:22 AM
EDT T2
9:09 AM
EDT
1h 47m
M T W T F S S
Prices
AA4654
AA American
E75
8:30 AM
EDT T2
10:17 AM
EDT
1h 47m
M T W T F S S
Prices
DL5841
DL Delta
E75S
10:00 AM
EDT T2
11:38 AM
EDT
1h 38m
M T W T F S S
Prices
DL5692
DL Delta
E75
10:05 AM
EDT T2
11:45 AM
EDT
1h 40m
M T W T F S S
Prices
B6654
B6 JetBlue
BCS3
10:05 AM
EDT T2
11:39 AM
EDT
1h 34m
M T W T F S S
Prices
AA4393
AA American
E75L
10:17 AM
EDT T2
11:46 AM
EDT
1h 29m
M T W T F S S
Prices
AA2148
AA American
319
10:45 AM
EDT T2
12:13 PM
EDT
1h 28m
M T W T F S S
Prices
AA2570
AA American
319
11:32 AM
EDT T2
1:03 PM
EDT
1h 31m
M T W T F S S
Prices
AA4494
AA American
E75
11:33 AM
EDT T2
1:14 PM
EDT
1h 41m
M T W T F S S
Prices
DL5670
DL Delta
E75
11:48 AM
EDT T2
1:31 PM
EDT
1h 43m
M T W T F S S
Prices
DL5693
DL Delta
E75
11:55 AM
EDT T2
1:37 PM
EDT
1h 42m
M T W T F S S
Prices
B61954
B6 JetBlue
BCS3
11:55 AM
EDT T2
1:26 PM
EDT
1h 31m
M T W T F S S
Prices
DL5843
DL Delta
E75
12:00 PM
EDT T2
1:32 PM
EDT
1h 32m
M T W T F S S
Prices
AA3425
AA American
E75
12:35 PM
EDT T2
2:12 PM
EDT
1h 37m
M T W T F S S
Prices
AA4400
AA American
E75
12:35 PM
EDT T2
2:14 PM
EDT
1h 39m
M T W T F S S
Prices
AA4178
AA American
E75
12:48 PM
EDT T2
2:30 PM
EDT
1h 42m
M T W T F S S
Prices
DL5592
DL Delta
E75
12:59 PM
EDT T2
2:42 PM
EDT
1h 43m
M T W T F S S
Prices
DL5687
DL Delta
E75
12:59 PM
EDT T2
2:22 PM
EDT
1h 23m
M T W T F S S
Prices
B62254
B6 JetBlue
223
1:00 PM
EDT T2
2:31 PM
EDT
1h 31m
M T W T F S S
Prices
AA3219
AA American
319
1:54 PM
EDT T2
3:33 PM
EDT
1h 39m
M T W T F S S
Prices
FI7826
FI Icelandair
223
1:57 PM
EDT T2
3:30 PM
EDT
1h 33m
M T W T F S S
Prices
AF2273
AF Air France
E75
2:00 PM
EDT T2
3:38 PM
EDT
1h 38m
M T W T F S S
Prices
DL5622
DL Delta
E75S
2:00 PM
EDT T2
3:38 PM
EDT
1h 38m
M T W T F S S
Prices
DL5672
DL Delta
E75S
2:25 PM
EDT T2
4:03 PM
EDT
1h 38m
M T W T F S S
Prices
DL5600
DL Delta
E75
3:15 PM
EDT T2
5:00 PM
EDT
1h 45m
M T W T F S S
Prices
AA1905
AA American
319
3:42 PM
EDT T2
5:24 PM
EDT
1h 42m
M T W T F S S
Prices
BA1850
BA British
319
3:50 PM
EDT T2
5:32 PM
EDT
1h 42m
M T W T F S S
Prices
B62554
B6 JetBlue
BCS3
3:55 PM
EDT T2
5:29 PM
EDT
1h 34m
M T W T F S S
Prices
FI7868
FI Icelandair
223
3:55 PM
EDT T2
5:29 PM
EDT
1h 34m
M T W T F S S
Prices
AA2493
AA American
319
3:59 PM
EDT T2
5:34 PM
EDT
1h 35m
M T W T F S S
Prices
AA1606
AA American
319
4:21 PM
EDT T2
5:43 PM
EDT
1h 22m
M T W T F S S
Prices
BA2495
BA British
319
4:28 PM
EDT T2
6:05 PM
EDT
1h 37m
M T W T F S S
Prices
AA3207
AA American
319
4:43 PM
EDT T2
6:24 PM
EDT
1h 41m
M T W T F S S
Prices
AA2926
AA American
319
4:45 PM
EDT T2
6:22 PM
EDT
1h 37m
M T W T F S S
Prices
FI7924
FI Icelandair
320
4:59 PM
EDT T2
6:36 PM
EDT
1h 37m
M T W T F S S
Prices
DL5682
DL Delta
E75
5:06 PM
EDT T2
6:52 PM
EDT
1h 46m
M T W T F S S
Prices
DL5847
DL Delta
E75
5:06 PM
EDT T2
6:52 PM
EDT
1h 46m
M T W T F S S
Prices
AA2311
AA American
319
5:50 PM
EDT T2
7:27 PM
EDT
1h 37m
M T W T F S S
Prices
AS4469
AS Alaska
E75
5:59 PM
EDT T2
7:40 PM
EDT
1h 41m
M T W T F S S
Prices
AA1893
AA American
319
5:59 PM
EDT T2
7:40 PM
EDT
1h 41m
M T W T F S S
Prices
DL5776
DL Delta
E75
6:10 PM
EDT T2
8:05 PM
EDT
1h 55m
M T W T F S S
Prices
AF2731
AF Air France
E75
6:30 PM
EDT T2
8:10 PM
EDT
1h 40m
M T W T F S S
Prices
DL5689
DL Delta
E75S
6:30 PM
EDT T2
8:10 PM
EDT
1h 40m
M T W T F S S
Prices
B61354
B6 JetBlue
320
6:56 PM
EDT T2
8:36 PM
EDT
1h 40m
M T W T F S S
Prices
B62754
B6 JetBlue
223
7:21 PM
EDT T2
8:51 PM
EDT
1h 30m
M T W T F S S
Prices
B62854
B6 JetBlue
223
7:59 PM
EDT T2
9:33 PM
EDT
1h 34m
M T W T F S S
Prices
BA1854
BA British
738
8:45 PM
EDT T2
10:22 PM
EDT
1h 37m
M T W T F S S
Prices
AA1386
AA American
738
8:55 PM
EDT T2
10:34 PM
EDT
1h 39m
M T W T F S S
Prices
B62354
B6 JetBlue
320
9:06 PM
EDT T2
11:33 PM
EDT
2h 27m
M T W T F S S
Prices
DL5844
DL Delta
E75S
10:00 PM
EDT T2
11:30 PM
EDT
1h 30m
M T W T F S S
Prices
DL5810
DL Delta
E75
10:00 PM
EDT T2
11:39 PM
EDT
1h 39m
M T W T F S S
Prices
AA1578
AA American
738
10:04 PM
EDT T2
11:35 PM
EDT
1h 31m
M T W T F S S
Prices
AA2120
AA American
319
10:30 PM
EDT T2
11:59 PM
EDT
1h 29m
M T W T F S S
Prices
AA4793
AA American
E75
10:40 PM
EDT T2
12:21 AM+1
EDT
1h 41m
M T W T F S S
Prices
AS4193
AS Alaska
E75
10:40 PM
EDT T2
12:21 AM+1
EDT
1h 41m
M T W T F S S
Prices
AA1821
AA American
319
6:00 AM
EDT TB
7:45 AM
EDT
1h 45m
M T W T F S S
Prices
AA2159
AA American
319
6:00 AM
EDT TB
7:46 AM
EDT
1h 46m
M T W T F S S
Prices
DL5687
DL Delta
E75
6:05 AM
EDT TA
8:00 AM
EDT
1h 55m
M T W T F S S
Prices
FI7825
FI Icelandair
223
6:10 AM
EDT TC
7:58 AM
EDT
1h 48m
M T W T F S S
Prices
B61155
B6 JetBlue
BCS3
6:15 AM
EDT TC
8:01 AM
EDT
1h 46m
M T W T F S S
Prices
AA1608
AA American
319
7:00 AM
EDT TB
8:45 AM
EDT
1h 45m
M T W T F S S
Prices
AA2611
AA American
319
7:00 AM
EDT TB
8:46 AM
EDT
1h 46m
M T W T F S S
Prices
AA4683
AA American
E75
7:00 AM
EDT TB
8:57 AM
EDT
1h 57m
M T W T F S S
Prices
FI7827
FI Icelandair
320
7:05 AM
EDT TC
8:56 AM
EDT
1h 51m
M T W T F S S
Prices
DL5692
DL Delta
E75S
7:35 AM
EDT TA
9:34 AM
EDT
1h 59m
M T W T F S S
Prices
AA1721
AA American
738
8:00 AM
EDT TB
9:50 AM
EDT
1h 50m
M T W T F S S
Prices
AA1906
AA American
738
8:04 AM
EDT TB
9:52 AM
EDT
1h 48m
M T W T F S S
Prices
B61555
B6 JetBlue
320
8:05 AM
EDT TC
9:56 AM
EDT
1h 51m
M T W T F S S
Prices
AA2951
AA American
319
9:10 AM
EDT TB
10:54 AM
EDT
1h 44m
M T W T F S S
Prices
B61455
B6 JetBlue
BCS3
9:15 AM
EDT TC
11:04 AM
EDT
1h 49m
M T W T F S S
Prices
AA2153
AA American
319
9:28 AM
EDT TB
11:10 AM
EDT
1h 42m
M T W T F S S
Prices
DL5693
DL Delta
E75
9:45 AM
EDT TA
11:36 AM
EDT
1h 51m
M T W T F S S
Prices
AA3817
AA American
E70
9:56 AM
EDT TB
11:49 AM
EDT
1h 53m
M T W T F S S
Prices
AA4776
AA American
E75S
9:57 AM
EDT TB
11:51 AM
EDT
1h 54m
M T W T F S S
Prices
AA4366
AA American
E75
11:10 AM
EDT TB
1:00 PM
EDT
1h 50m
M T W T F S S
Prices
DL5672
DL Delta
E75S
11:55 AM
EDT TA
1:44 PM
EDT
1h 49m
M T W T F S S
Prices
AA2148
AA American
319
12:42 PM
EDT TB
2:22 PM
EDT
1h 40m
M T W T F S S
Prices
AA4383
AA American
E75
1:06 PM
EDT TB
2:59 PM
EDT
1h 53m
M T W T F S S
Prices
B61855
B6 JetBlue
BCS3
1:08 PM
EDT TC
2:52 PM
EDT
1h 44m
M T W T F S S
Prices
B62055
B6 JetBlue
223
1:10 PM
EDT TC
2:58 PM
EDT
1h 48m
M T W T F S S
Prices
AS4535
AS Alaska
E75
1:44 PM
EDT TB
3:42 PM
EDT
1h 58m
M T W T F S S
Prices
AA4794
AA American
E75S
1:50 PM
EDT TB
3:48 PM
EDT
1h 58m
M T W T F S S
Prices
AS4070
AS Alaska
E75
1:50 PM
EDT TB
3:48 PM
EDT
1h 58m
M T W T F S S
Prices
AS4269
AS Alaska
319
1:55 PM
EDT TB
3:42 PM
EDT
1h 47m
M T W T F S S
Prices
AA2570
AA American
319
1:55 PM
EDT TB
3:42 PM
EDT
1h 47m
M T W T F S S
Prices
DL5820
DL Delta
E75
2:10 PM
EDT TA
4:02 PM
EDT
1h 52m
M T W T F S S
Prices
DL5857
DL Delta
E75S
2:10 PM
EDT TA
4:04 PM
EDT
1h 54m
M T W T F S S
Prices
FI7871
FI Icelandair
320
2:30 PM
EDT TC
4:18 PM
EDT
1h 48m
M T W T F S S
Prices
B61955
B6 JetBlue
320
2:32 PM
EDT TC
4:20 PM
EDT
1h 48m
M T W T F S S
Prices
DL5682
DL Delta
E75S
3:30 PM
EDT TA
5:24 PM
EDT
1h 54m
M T W T F S S
Prices
AA4391
AA American
E75S
3:40 PM
EDT TB
5:38 PM
EDT
1h 58m
M T W T F S S
Prices
DL5689
DL Delta
E75S
3:55 PM
EDT TA
5:49 PM
EDT
1h 54m
M T W T F S S
Prices
AA4370
AA American
E75
4:00 PM
EDT TB
5:59 PM
EDT
1h 59m
M T W T F S S
Prices
B61355
B6 JetBlue
223
4:20 PM
EDT TC
5:09 PM
EDT
0h 49m
M T W T F S S
Prices
AA1606
AA American
319
4:55 PM
EDT TB
6:43 PM
EDT
1h 48m
M T W T F S S
Prices
BA1823
BA British
319
5:00 PM
EDT TB
6:48 PM
EDT
1h 48m
M T W T F S S
Prices
AA3219
AA American
319
5:30 PM
EDT TB
7:20 PM
EDT
1h 50m
M T W T F S S
Prices
DL5667
DL Delta
E75
5:55 PM
EDT TA
7:55 PM
EDT
2h
M T W T F S S
Prices
B62255
B6 JetBlue
223
6:34 PM
EDT TC
8:51 PM
EDT
2h 17m
M T W T F S S
Prices
B62355
B6 JetBlue
223
7:25 PM
EDT TC
9:15 PM
EDT
1h 50m
M T W T F S S
Prices
FI7829
FI Icelandair
223
7:25 PM
EDT TC
9:15 PM
EDT
1h 50m
M T W T F S S
Prices
AA2311
AA American
319
8:14 PM
EDT TB
10:00 PM
EDT
1h 46m
M T W T F S S
Prices
DL5666
DL Delta
E75S
8:15 PM
EDT TA
10:08 PM
EDT
1h 53m
M T W T F S S
Prices
BA1886
BA British
319
8:30 PM
EDT TB
10:16 PM
EDT
1h 46m
M T W T F S S
Prices
AA1893
AA American
319
8:30 PM
EDT TB
10:15 PM
EDT
1h 45m
M T W T F S S
Prices
AF2571
AF Air France
E75
9:50 PM
EDT TA
11:40 PM
EDT
1h 50m
M T W T F S S
Prices
DL5704
DL Delta
E75
9:55 PM
EDT TA
11:44 PM
EDT
1h 49m
M T W T F S S
Prices

No flights match your filters.

No nonstop flights on this route. connecting options below.

1-STOP
2-STOP Loading...
Washington to Boston
7 carriers, 342 flights/week nonstop.
7 Airlines 342 Flights/wk 398 mi 1h 22m nonstop 75 1-stop hubs

DCA–BOS is served by 7 airlines with nonstop service. American Airlines, Delta Air Lines and JetBlue lead the route. The flight covers 398 miles in approximately 1h 22m. Beyond nonstop, 75 hubs offer 1-stop connections.

Airline Landscape

All carriers operating nonstop DCA–BOS service, compared side by side.
Airline Freq/wk Aircraft Duration Dep OTP Alliance Codeshares
AA American Airlines 120 319, 738, E75, E75L, E75S 1h22-1h47 68% Oneworld
DL Delta Air Lines 105 E75, E75S 1h23-1h55 68% SkyTeam
B6 JetBlue 59 223, 320, BCS3 1h28-2h27 68%
FI Icelandair 27 223, 320 1h28-1h37 68%
BA British Airways 16 319, 738 1h37-1h42 68% Oneworld
AS Alaska Airlines 8 E75 1h41 68% Oneworld
AF Air France 7 E75 1h38-1h40 68% SkyTeam
Aircraft on this route
223 Airbus A220-300 – B6, FI
319 Airbus A319 – AA, BA
320 Airbus A320 – B6, FI
738 Boeing 737-800 – AA, BA
BCS3 Airbus A220-300 – B6
E75 Embraer E175 – AA, AF, AS, DL
E75L Embraer E175 Long Wing – AA
E75S Embraer E175 STD – AA, DL
Alliance coverage
Oneworld: AA + AS + BA (144 flights/wk, 42%)
SkyTeam: AF + DL (112 flights/wk, 33%)
Unaffiliated: B6 + FI (86 flights/wk, 25%)
OTP based on airport-level delay snapshots. Duration ranges reflect seasonal/directional variation.

Weekly Schedule Pattern

Nonstop flight frequency by day of week, DCA to BOS direction.
Mon
51
flights
Tue
50
flights
Wed
51
flights
Thu
51
flights
Fri
53
flights
Sat
36
flights
Sun
50
flights
Departure time distribution
12 AM6 AM12 PM6 PM12 AM
Morning departures
Afternoon/evening departures
60
Nonstop flights
342
Outbound / wk
319
Return / wk

Connection Landscape

Beyond nonstop. 1-stop and 2-stop options for DCA to BOS.
1-STOP
One-Stop Connections
75
Hubs
~3h
Fastest
~28h
Longest
Verified with published schedule alignment and minimum connection time.
2-STOP
Two-Stop Connections
3,767
Candidates
Two-stop connections loaded in the connections tab above.
Connections computed from published schedules with minimum connection time verification. Use the interactive explorer above the fold to filter by airline, tier, and layover time.

On-Time Performance

What to expect at each end of your journey.
Outbound
DCA → BOS
68%
Moderate delays possible. Allow buffer time.
Departing
68%
Arriving
92%
Return
BOS → DCA
82%
Generally reliable. Most flights run on time.
Departing
82%
Arriving
90%
OTP = percentage of flights arriving within 15 min of schedule. Based on airport-level delay snapshots. DCA delays → BOS delays →

Other ways to reach Boston from Washington

Nearby airports with service to Boston Logan International Airport.
Metric DCA→BOS IAD→BOS BWI→BOS
Distance from DCA 23 mi 30 mi
Nonstop airlines 7 8 7
Weekly flights 342 70 129
Flight time 1h 22m 1h 36m 0h 49m
Departure OTP 68%
Airports within 200 miles of DCA with service to Boston Logan International Airport.

Travel Essentials

Practical planning for this route.
Time Difference
0h
Boston is 0 hours the same as Washington.
DCA: EDT · BOS: EDT

When it's 6:00 PM in Washington, it's 6:00 PM in Boston.
Distance & Flight Time
398 mi / 641 km
Nonstop flight time is approximately 1h 22m to 2h 27m.
Getting to DCA

The DC Metro (Yellow and Blue lines) connects the airport directly to downtown Washington in 15–25 minutes from most central stations ($2.25–$3.85 depending on distance and time of day). The Reagan National Airport station is inside the terminal complex with a direct indoor walkway. Metro runs from about 05:00 to midnight Sunday–Thursday, and until 01:00 on Friday–Saturday.Taxis and Uber/Lyft from the city centre cost $15–30 depending on destination and traffic. DCA is one of the most transit-accessible major US airports. Driving is straightforward via the George Washington Memorial Parkway; short-term parking at the terminal costs from $5 for 20 minutes. No personal vehicles are allowed to idle at arrivals; use the cell-phone lot or commercial pick-up zones.

Getting from BOS

Silver Line SL1 (free from Logan) runs to South Station in 15–20 minutes, connecting to the Red Line subway and Amtrak services. The Massport Shuttle connects all Logan terminals and the remote parking areas; it's also the transfer between terminals. Water taxi to Long Wharf (downtown) is $12 and runs seasonally; check weather and schedule.Taxis to downtown Boston cost $30–45 (tunnel toll included in meter). Ride-hails pick up at designated zones; follow the Logan app directions to avoid the main curb chaos. MBTA Blue Line (Airport station, free shuttle from terminals) reaches downtown in 10 minutes but requires a separate transfer. Amtrak Acela to New York departs from South Station (2.5h, from $49).

Boston Climate

Humid continental climate with significant maritime influence. Winters (December–March) bring regular Nor'easters. These coastal storms that dump heavy snow and produce high winds, frequently closing Logan for hours and causing mass cancellations. Ice storms hit several times each winter. BOS is one of the most weather-disrupted major US airports in winter.

Summers are warm (22–29°C) with humidity and afternoon thunderstorms causing July–August delays. Hurricane remnants reach New England in September–October. Spring and fall are mild (8–18°C) but unpredictable. Logan's harbor location means it runs windier than inland readings suggest. Factor this into small aircraft routing.

DCA–BOS Quick Facts

Key statistics for the Washington to Boston route.
Route details
Distance398 mi / 641 km
Flight time1h 22m to 2h 27m
Time difference0 hours
Airlines (nonstop)7
Weekly flights342 out / 319 return
1-stop connections75 hubs
Origin: DCA
IATA / ICAODCA / KDCA
TimezoneAmerica/New_York
Passengers/yr25.5M
Elevation15 ft / 5 m
Destination: BOS
IATA / ICAOBOS / KBOS
TimezoneAmerica/New_York
Passengers/yr42.2M
Elevation20 ft / 6 m

Frequently Asked Questions

Common questions about DCA to BOS flights.
Nonstop flights from Ronald Reagan Washington National Airport to Boston Logan International Airport take approximately 1h 22m to 2h 27m. The route covers 398 miles.
There are approximately 342 nonstop flights per week from DCA to BOS. The return direction has about 319 weekly flights.
Yes, 1-stop connections are available through HPN, PWM, BWI, BTV, GSP, YOW, HHH, OPF, DAB, SGR, APA, EYW, BFI, MKE, YUL, PIT, VPS, EWR, JFK, CLE, CLT, YYZ, AGS, MDW, PDX, LGA, CMH, ATL, BUF, JAX, RDU, ORF, DTW, ORD, MEM, PHL, MCI, ROC, SYR, TYS, CVG, AVL, DSM, IND, BNA, CHS, RSW, MSP, MIA, STL, TPA, SAV, SLC, SDF, MCO, FLL, PBI, SAN, ILM, DEN, IAH, SEA, MSY, DFW, SRQ, SJU, PHX, MYR, SAT, DAL, LAX, LAS, AUS, SFO and NAS. These options provide additional schedule flexibility.
Yes, return flights from BOS to DCA are available. Use the direction toggle at the top to view the return schedule.
Nearby alternatives include IAD, BWI and MDT. See the Alternatives section for a full comparison.
Click the 'Search Flights' button to check availability and prices on Google Flights. You can also compare airlines and schedules on this page to find the best option.
See the On-Time Performance section for the latest delay data at both airports. This shows departure and arrival reliability to help you plan.
Route data is updated regularly from official airline schedules. On-time performance data comes from recent airport delay snapshots.
Amtrak's Acela connects Washington Union Station to Boston South Station in 6.5–7 hours, with an intermediate stop at Penn Station New York. For travelers going specifically between Washington DC and Boston city centers, the train is a genuine alternative given downtown-to-downtown access. Flying wins on raw travel time, but airport processing at DCA and BOS narrows the practical advantage to roughly 2–3 hours.
Reagan National operates under FAA slot and perimeter controls. Boston falls within the perimeter (under 1,250 miles) but the slot limits constrain total daily departure capacity at DCA regardless of destination. The DCA-BOS corridor is one of the busier short-haul slot uses at DCA, served by American, Delta, JetBlue, and United.
Boston Logan uses Terminals A, B, C, and E. JetBlue operates from Terminal C, Delta from Terminal A, and American and United from Terminal B. Terminal E handles international arrivals. Travelers connecting at BOS should note the terminal structure, as inter-terminal transfers require exiting security at Logan.

Washington Reagan to Boston Logan Route

DCA-BOS is a Northeast Corridor shuttle route of 400 miles connecting two of the US's most politically and economically significant cities. Six airlines serve roughly 269 weekly frequencies. The corridor competes directly with Amtrak's Acela high-speed rail service, making it one of the few US domestic routes where air-rail competition meaningfully shapes carrier scheduling and pricing. Block time is 1 hour 30 minutes.

Slot Constraints and Rail Competition

Reagan National's slot controls limit total DCA departure capacity, making DCA-BOS one of the constrained high-demand slot uses among short-haul Northeast routes. JetBlue, American, Delta, and United all maintain presence on the corridor. Amtrak's downtown-to-downtown routing and expanding Acela capacity give the DCA-BOS market an unusually competitive intermodal dynamic. Fare elasticity between rail and air on this segment is higher than on most US domestic routes.