Islip to Dulles (ISP–IAD) — Airlines, Schedules & Connections

ISP Airport Page →
264 mi airlines 1/wk
On-time Some delays Frequent delays
Flight Schedule 0 flights Verified 45m ago
Nonstop 1-Stop 2-Stop Hide separate tickets Hide overnight
  Flight Airline AC Dep Arr Dur OTP Sched  

No flights match your filters.

No nonstop flights on this route. connecting options below.

✦ 1-STOP
✧ 2-STOP Loading...
Islip to Dulles
Connecting service available through multiple hubs.
1 Flights/wk 264 mi 0h 58m nonstop 16 1-stop hubs

While no nonstop service exists between ISP and IAD, connecting options are available through 16 hubs.

Also explore ISP Routes IAD Routes ISP Live Flights IAD Live Flights ISP Delays IAD Delays
Connections

Connection Landscape

Beyond nonstop. 1-stop and 2-stop options for ISP to IAD.
1-STOP
One-Stop Connections
16
Hubs
~2h
Fastest
~24h
Longest
HPN ~2h 44m BWI ~3h 13m PVD ~3h 46m ILM ~4h 14m CLT ~4h 54m
Verified with published schedule alignment and minimum connection time.
2-STOP
Two-Stop Connections
656
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.
Reliability

On-Time Performance

What to expect at each end of your journey.
Outbound
ISP → IAD
0%
Frequent delays expected. Consider flexible booking.
Departing
0%
Arriving
64%
Return
IAD → ISP
62%
Moderate delays possible. Allow buffer time.
Departing
62%
Arriving
100%
OTP = percentage of flights arriving within 15 min of schedule. Based on airport-level delay snapshots. ISP delays → IAD delays →
Alternatives

Other ways to reach Dulles from Islip

Nearby airports with service to Washington Dulles International Airport.
Metric ISP→IAD HPN→IAD JFK→IAD
Distance from ISP – 37 mi 37 mi
Nonstop airlines 0 7 6
Weekly flights 1 2 49
Flight time 0h 58m 0h 50m 0h 55m
Departure OTP 0% – –
White Plains (HPN) to Dulles flights · New York (JFK) to Dulles flights · New York (LGA) to Dulles flights
Airports within 200 miles of ISP with service to Washington Dulles International Airport.
Know before you go

Travel Essentials

Practical planning for this route.
Time Difference
0h
Dulles is 0 hours the same as Islip.
ISP: EDT · IAD: EDT

When it's 6:00 PM in Islip, it's 6:00 PM in Dulles.
Distance & Flight Time
264 mi / 425 km
Nonstop flight time is approximately 0h 58m.
Getting from IAD

Silver Line Metro runs from Washington Dulles Airport station to Metro Center in about 65 minutes (~$7). The route bypasses I-66 and I-495 congestion entirely. Washington Flyer coach also runs to Wiehle-Reston East station ($6, 15 min) for Metro connection.Taxis and ride-shares to downtown DC cost $55–80 and take 35–55 minutes depending on traffic. Car rental facilities are on-site. Dulles is 27 miles west of the Capitol; it is farther than either DCA or BWI from central DC.

Dulles Climate

Humid continental climate. Summers are hot and muggy (30–36°C) with frequent afternoon thunderstorms that cause delays June through August. Winters bring cold temperatures (−3 to 5°C) with snow and ice. The Virginia suburbs accumulate more snow than downtown DC, and ice storms are the primary disruption risk.

Dulles sits at higher elevation in Virginia's piedmont and sees more winter precipitation than DCA. Spring and fall are variable. Snowfall is possible into April. Thunderstorms begin from April through May.

Check current weather forecasts before travel.
Facts

ISP–IAD Quick Facts

Key statistics for the Islip to Dulles route.
Route details
Distance264 mi / 425 km
Flight time0h 58m
Time difference0 hours
Airlines (nonstop)0
Weekly flights1 out
1-stop connections16 hubs
Origin: ISP
Full nameLong Island MacArthur Airport
IATA / ICAOISP / KISP
TimezoneAmerica/New_York
Passengers/yr1.4M
Elevation99 ft / 30 m
Destination: IAD
Full nameWashington Dulles International Airport
IATA / ICAOIAD / KIAD
TimezoneAmerica/New_York
Passengers/yr26.0M
Elevation312 ft / 95 m
FAQ

Frequently Asked Questions

Common questions about ISP to IAD flights.
Nonstop flights from Long Island MacArthur Airport to Washington Dulles International Airport take approximately 0h 58m. The route covers 264 miles.
There are approximately 1 nonstop flights per week from ISP to IAD.
Yes, 1-stop connections are available through HPN, BWI, PVD, ILM, CLT, BCT, SRQ, PDX, VNY, MCO, FLL, RDU, BOS, TPA, PBI and RSW. These options provide additional schedule flexibility.
Yes, return flights from IAD to ISP are available. Use the direction toggle at the top to view the return schedule.
Nearby alternatives include HPN, JFK and LGA. 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.

Flights from ISP to IAD

Long Island MacArthur Airport (ISP) and Washington Dulles International Airport (IAD) are connected through multiple connecting hub airports.

ISP to IAD Flight Duration and Schedule

Nonstop flight time from ISP to IAD ranges from 0 hours 58 minutes. The route covers a distance of 264 miles (425 km).

Connecting Options and Alternatives

16 one-stop connections are available, with the fastest taking approximately 2 hours via HPN. Two-stop connections are also available via intermediate hubs. Nearby alternative airports include White Plains (HPN), New York (JFK) and New York (LGA).