HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Washington, D.C.

$85+ Cheap flights from Islip, NY (ISP) to Washington, D.C. (WAS)

ISP — WAS
Nov 18 — Nov 251
Wed 11/18
Wed 11/25
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Islip to Washington, D.C. 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 Washington, D.C.

Cheapest flights from Islip to Washington, D.C.

Mon 11/95:40 pm -
Nonstop1h 20m
Wed 11/1110:40 am -
Nonstop1h 05m
Deal found 10/15$169
Sun 12/65:40 pm -
Nonstop1h 20m
Wed 12/93:05 pm -
Nonstop1h 10m
Deal found 10/16$259
Thu 11/1212:25 pm -
Nonstop1h 20m
Wed 11/183:05 pm -
Nonstop1h 10m
Deal found 10/19$277
Fri 11/1312:25 pm -
Nonstop1h 20m
Sun 11/1510:35 am -
Nonstop1h 10m
Deal found 10/14$307
Mon 12/79:33 pm -
1 stop16h 52m
Thu 12/106:41 pm -
2 stops19h 41m
Deal found 10/16$328
Mon 11/304:55 pm -
Nonstop1h 20m
Sat 12/510:55 am -
Nonstop1h 10m
Deal found 10/14$337
Mon 11/304:55 pm -
Nonstop1h 20m
Fri 12/48:35 pm -
Nonstop1h 10m
Deal found 10/16$340
Sun 12/66:10 pm -
1 stop15h 11m
Wed 12/96:41 pm -
2 stops15h 36m
Deal found 10/16$342
Mon 12/76:05 am -
Nonstop1h 15m
Thu 12/108:35 pm -
Nonstop1h 10m
Deal found 10/16$349
Wed 11/44:05 pm -
Nonstop1h 20m
Thu 11/53:55 pm -
Nonstop1h 10m
Deal found 10/15$364
Thu 12/106:26 pm -
1 stop14h 55m
Sun 12/136:41 pm -
2 stops19h 41m
Deal found 10/16$374
Mon 11/309:33 pm -
1 stop16h 52m
Sat 12/52:00 pm -
2 stops20h 17m
Deal found 10/14$396

Find flight deals from Islip to Washington, D.C.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$163
(Southwest)

One-way from

$85
(Southwest)

Popular in

July

Cheapest in

September

Average price

$534

Good round-trip deal

$368 or less

Good one-way deal

$218 or less
Provider with most accurate pricing for Islip Long Island-Washington, D.C. (WAS) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Islip Long Island-Washington, D.C. (WAS) flights.
Search Deals
From Islip Long Island to Washington, D.C. (WAS)
Search Deals
One-way flight from Islip Long Island to Washington, D.C. (WAS)
Search Deals
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($25 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2026
Search Deals
Price to beat on a round-trip flight from Islip Long Island to Washington, D.C. (WAS).
Search Deals
Price to beat on a one-way flight from Islip Long Island to Washington, D.C. (WAS).
Search Deals

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

IslipBaltimore

ISP Islip Long Island - BWI Baltimore/Washington

ISPBWI

Islip Long Island

Mon 12/14

6:05 am-7:20 am

Nonstop1h 15m

Baltimore/Washington

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$85

IslipBaltimore

ISP Islip Long Island - BWI Baltimore/Washington

ISPBWI

Islip Long Island

Sun 11/22

5:40 pm-7:00 pm

Nonstop1h 20m

Baltimore/Washington

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$123

IslipBaltimore

ISP Islip Long Island - BWI Baltimore/Washington

ISPBWI

Islip Long Island

Fri 11/20

3:02 pm-12:42 am

2 stops33h 40m

Baltimore/Washington

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$142

IslipBaltimore

ISP Islip Long Island - BWI Baltimore/Washington

ISPBWI

Islip Long Island

Sat 11/14

12:45 pm-2:05 pm

Nonstop1h 20m

Baltimore/Washington

Mon 11/16

3:05 pm-4:15 pm

Nonstop1h 10m

$163

IslipBaltimore

ISP Islip Long Island - BWI Baltimore/Washington

ISPBWI

Islip Long Island

Mon 11/9

5:40 pm-7:00 pm

Nonstop1h 20m

Baltimore/Washington

Wed 11/11

10:40 am-11:45 am

Nonstop1h 05m

$169

IslipBaltimore

ISP Islip Long Island - BWI Baltimore/Washington

ISPBWI

Islip Long Island

Sun 12/13

6:15 pm-9:11 am

1 stop14h 56m

Baltimore/Washington

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$175

IslipBaltimore

ISP Islip Long Island - BWI Baltimore/Washington

ISPBWI

Islip Long Island

Mon 12/7

6:05 am-7:20 am

Nonstop1h 15m

Baltimore/Washington

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$175

IslipBaltimore

ISP Islip Long Island - BWI Baltimore/Washington

ISPBWI

Islip Long Island

Sun 12/13

5:40 pm-7:00 pm

Nonstop1h 20m

Baltimore/Washington

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$175

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

IslipBaltimore

ISP Islip Long Island - BWI Baltimore/Washington

ISPBWI

Islip Long Island

Fri 11/20

12:25 pm-1:45 pm

Nonstop1h 20m

Baltimore/Washington

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$184

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/16

Showing 1-10 of 34 resultsSorted by cheapest first
1
2
3
4

Compare providers for flights from Islip to Washington, D.C.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Islip to Washington, D.C. in October.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
ExpediaPrice Accuracy1 starTrust 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. 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. flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Islip, New York-Washington, D.C. 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. 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. 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 Washington, D.C.

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

Cheapflights Insights

Everything you need to know about your flight from Islip to Washington, D.C.

What is the cheapest time of day to fly from ISP to WAS?

When flying from Islip, New York to Washington, D.C., the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 21% versus a flight at noon.

Reviews of airlines servicing Washington, D.C.

Get a feel of what it's like to fly with Southwest from Islip to Washington, D.C. by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
7.9
Good
4,209 reviews

Food

7.0

Crew

8.6

Boarding

8.1

Entertainment

7.5

Overall

7.9

Comfort

8.0

Reviews

1 / 20
6.0
Good

Lauren,Dec 2024

MCI - DCA

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.
Southwest
7.9
Good
4,209 reviews
Southwest
7.9
Good
4,209 reviews

Food

7.0

Crew

8.6

Boarding

8.1

Entertainment

7.5

Overall

7.9

Comfort

8.0

Reviews

1 / 20
6.0
Good

Lauren,Dec 2024

MCI - DCA

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Related info for your journey

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

    Located just 7.2 mi from the city center, Islip Long Island is the airport most travelers will use when flying to Washington, D.C. from Islip. Booking flights from Long Island (ISP) to Washington, D.C. should be relatively easy as there are 0 daily outbound flights to Washington, D.C. from 1 airline.

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

    There are many flights that can get you from Islip, New York to Washington, D.C. in 1h 20m. Fly via Southwest to get the fastest option. The distance between Islip, New York and Washington, D.C. is about 219 mi. All flights are typically nonstop.

  • Can I find deals for flights from Islip to Washington, D.C. that include hotel bookings?

    Yes. In addition to deals on Islip to Washington, D.C. flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Islip to Washington, D.C.?

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

  • Can I find deals for business class flights from Islip to Washington, D.C.?

    Yes. Cheapflights offers flight deals from Islip to Washington, D.C. 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.?

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

Browse thousands of different options on Cheapflights for your next trip

Top airline flying from Islip to Washington, D.C.

AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$197Average$381FlexibilityNo cancel feeOn-time63%

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.
Site
©2026 Cheapflights