HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Reagan-National

$180+ Cheap flights from Islip, NY (ISP) to Reagan-National (DCA)

ISP — DCA
Nov 21 — Nov 281
Sat 11/21
Sat 11/28
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Islip to Reagan-National with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Islip to Reagan-National

Cheapest flights from Islip to Reagan-National

Fri 11/201:35 pm -
2 stops9h 05m
Fri 11/276:10 am -
1 stop6h 35m
Deal found 10/21$416
Fri 11/134:25 pm -
1 stop6h 15m
Sat 11/146:00 am -
1 stop8h 20m
Deal found 10/18$437
Thu 12/35:05 pm -
1 stop5h 50m
Sun 12/66:10 am -
2 stops9h 25m
Deal found 10/20$445
Fri 11/2012:36 pm -
1 stop22h 39m
Sun 11/224:46 pm -
1 stop16h 04m
Deal found 10/19$475
Mon 11/91:35 pm -
2 stops9h 05m
Thu 11/126:10 am -
2 stops9h 25m
Deal found 10/18$487
Thu 11/54:25 pm -
1 stop6h 15m
Mon 11/96:10 am -
2 stops9h 25m
Deal found 10/21$543

Find flight deals from Islip to Reagan-National

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$437
(Southwest)

One-way from

$180
(Southwest)

Popular in

September

Cheapest in

February

Average price

$318
Provider with most accurate pricing for Islip Long Island-Washington, D.C. Reagan-National flight deals.
Search Deals
Provider most trusted by Cheapflights users for Islip Long Island-Washington, D.C. Reagan-National flights.
Search Deals
From Islip Long Island to Washington, D.C. Reagan-National
Search Deals
One-way flight from Islip Long Island to Washington, D.C. Reagan-National
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($38 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2026
Search Deals

Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Islip to Washington, D.C. Reagan-National Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

IslipWashington, D.C.

ISP Islip Long Island - DCA Washington, D.C. Reagan-National

ISPDCA

Islip Long Island

Fri 11/13

4:25 pm-10:40 pm

1 stop6h 15m

Washington, D.C. Reagan-National

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$180

IslipWashington, D.C.

ISP Islip Long Island - DCA Washington, D.C. Reagan-National

ISPDCA

Islip Long Island

Thu 11/19

12:36 pm-11:15 am

1 stop22h 39m

Washington, D.C. Reagan-National

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$194

IslipWashington, D.C.

ISP Islip Long Island - DCA Washington, D.C. Reagan-National

ISPDCA

Islip Long Island

Fri 11/20

1:35 pm-10:40 pm

2 stops9h 05m

Washington, D.C. Reagan-National

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$217

IslipWashington, D.C.

ISP Islip Long Island - DCA Washington, D.C. Reagan-National

ISPDCA

Islip Long Island

Fri 11/20

12:36 pm-11:15 am

1 stop22h 39m

Washington, D.C. Reagan-National

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$229

IslipWashington, D.C.

ISP Islip Long Island - DCA Washington, D.C. Reagan-National

ISPDCA

Islip Long Island

Mon 11/9

6:00 am-9:59 am

1 stop27h 59m

Washington, D.C. Reagan-National

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$237

IslipWashington, D.C.

ISP Islip Long Island - DCA Washington, D.C. Reagan-National

ISPDCA

Islip Long Island

Mon 11/9

1:35 pm-10:40 pm

2 stops9h 05m

Washington, D.C. Reagan-National

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$274

IslipWashington, D.C.

ISP Islip Long Island - DCA Washington, D.C. Reagan-National

ISPDCA

Islip Long Island

Fri 11/20

1:35 pm-10:40 pm

2 stops9h 05m

Washington, D.C. Reagan-National

Fri 11/27

6:10 am-12:45 pm

1 stop6h 35m

$416

IslipWashington, D.C.

ISP Islip Long Island - DCA Washington, D.C. Reagan-National

ISPDCA

Islip Long Island

Fri 11/13

4:25 pm-10:40 pm

1 stop6h 15m

Washington, D.C. Reagan-National

Sat 11/14

6:00 am-2:20 pm

1 stop8h 20m

$437

IslipWashington, D.C.

ISP Islip Long Island - DCA Washington, D.C. Reagan-National

ISPDCA

Islip Long Island

Thu 12/3

5:05 pm-10:55 pm

1 stop5h 50m

Washington, D.C. Reagan-National

Sun 12/6

6:10 am-3:35 pm

2 stops9h 25m

$445

IslipWashington, D.C.

ISP Islip Long Island - DCA Washington, D.C. Reagan-National

ISPDCA

Islip Long Island

Mon 11/9

1:35 pm-10:40 pm

2 stops9h 05m

Washington, D.C. Reagan-National

Thu 11/12

6:10 am-3:35 pm

2 stops9h 25m

$487

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/18

Showing 1-10 of 13 resultsSorted by cheapest first
1
2

Compare providers for flights from Islip to Reagan-National

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Islip to Reagan-National in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Islip, New York-Washington, D.C. Reagan-National Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Islip, New York-Washington, D.C. Reagan-National Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Islip, New York-Washington, D.C. Reagan-National Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Islip, New York-Washington, D.C. Reagan-National Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Islip, New York-Washington, D.C. Reagan-National Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Islip to Reagan-National

Have a flexible travel schedule? Discover the best time to fly to Reagan-National from Islip with our price prediction graph.
Estimated round-trip price

Related info for your journey

  • What airport do you fly from for flights from Islip to Washington, D.C. Reagan-National?

    Islip Long Island (ISP) is the airport you will fly out of if you book a flight from Islip to Washington, D.C. Reagan-National. You should not have trouble finding flights to Washington, D.C. Reagan-National from Long Island; the airport handles an average of 0 outbound flights to Washington, D.C. Reagan-National per day. You should also have plenty of airline options to choose from since 0 airlines have flights from the Islip airport to Washington, D.C. Reagan-National. It is only a 7.2 mi journey to Long Island (ISP) from Islip’s city center.

  • How long is the flight from Islip, New York to Washington, D.C. Reagan-National Airport?

    Departing from Islip, New York to Washington, D.C. Reagan-National Airport will take you 9h 05m. The distance between Islip, New York and Washington, D.C. Reagan-National Airport is about 248 mi.

  • Can I find deals for flights from Islip to Reagan-National that include hotel bookings?

    Yes. In addition to deals on Islip to Reagan-National flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Islip to Reagan-National?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Islip to Reagan-National.

  • Can I find deals for business class flights from Islip to Reagan-National?

    Yes. Cheapflights offers flight deals from Islip to Reagan-National by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Traveling to a place near Washington, D.C. Reagan-National Airport?

Book flights to Washington, D.C. Reagan-National Airport if you plan to visit one of these locations
Alexandria
Woodbridge
Arlington
Owings Mills
Lanham
Reston
Herndon
Hyattsville
Rockville
Springfield
Fredericksburg
Falls Church
Tysons
Towson
Oxon Hill
Laurel
Clinton
Hunt Valley
Waldorf
Silver Spring

Browse thousands of different options on Cheapflights for your next trip

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.