Flights from Washington DC to Islip Long Island

Our cheapest offers for flights from Washington DC to Islip Long Island

Here you can compare cheap flights from Washington DC (IAD) to Islip Long Island (ISP) for one-way or return trips. The following offers were searched for and found on idealo during the last few days. Or start your own flight search to Islip Long Island. Prices and availability may change at any time.

Outbound Return Airlines Shop Baggage Price
Washington DC
Islip - Long Island
Outbound
09/04/25
1 Stopover (TPA)
F92953, F93356
18h 50min
Return
09/28/25
1 Stopover (TPA)
F93323, F92954
27h 30min
Frontier Airlines
$213
Best option
Washington DC
Islip - Long Island
Outbound
10/18/25
1 Stopover (MCO)
F94811, F93056
23h 35min
Return
11/17/25
1 Stopover (TPA)
F93355, F92954
10h 59min
Frontier Airlines
$244
Washington DC
Islip - Long Island
Outbound
09/04/25
1 Stopover (TPA)
F92953, F93356
18h 50min
Return
09/28/25
1 Stopover (TPA)
F93323, F92954
27h 30min
Frontier Airlines
$224
Washington DC
Islip - Long Island
Outbound
10/18/25
1 Stopover (MCO)
F94811, F93056
23h 35min
Return
11/17/25
1 Stopover (TPA)
F93355, F92954
10h 59min
Frontier Airlines
$255
Prices based on recent searches, subject to last-minute changes
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Important flight information

Flight information: Washington DC - Islip - Long Island

Roundtrip from $212.77
Distance 425 km
Departure airport Airport Washington DC - Dulles International Airport, DC (IAD)
Arrival airport Airport Islip - Long Island MacArthur Airport,NY (ISP)
Destination country Flights to United States
Alternative routes to United States
Alternative flights to Islip - Long Island
Flight destinations with a similar price