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Washington, D.C.

$62+ Cheap flights from Islip, NY (ISP) to Washington, D.C. (WAS)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/1. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — WAS
nov. 29 — dic. 61
sáb. 11/29
sáb. 12/6
1 adult, Economy
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Cheap flight deals from Islip to Washington, D.C.

Discover tips and strategies to find the most affordable flight options for your journey from Islip (ISP) to Washington, D.C. (WAS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated octubre 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$150
(Kiwi.com)

One-way from

$64
(Trip.com)

Popular in

July

Cheapest in

May

Average price

$430

Good round-trip deal

$339 or less

Good one-way deal

$149 or less
Provider with most accurate pricing for Islip Long Island-Washington, D.C. (WAS) flight deals.
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Provider most trusted by Cheapflights users for Islip Long Island-Washington, D.C. (WAS) flights.
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From Islip Long Island to Washington, D.C. (WAS)
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One-way flight from Islip Long Island to Washington, D.C. (WAS)
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Highest demand for flights based on searches. 24% potential increase in price ($150 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($27 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Price to beat on a round-trip flight from Islip Long Island to Washington, D.C. (WAS).
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Price to beat on a one-way flight from Islip Long Island to Washington, D.C. (WAS).
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Find flight deals from Islip to Washington, D.C.

Cheapest flights from Islip to Washington, D.C.
Explore the most affordable flight options available from Islip to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on octubre 30, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/136:37 pmISP - BWI
1 stop13h 57mMultiple Airlines
lun. 11/174:52 pmBWI - ISP
1 stop24h 50mMultiple Airlines
Deal found 10/30$159
This Kiwi.com deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 12/58:29 pmISP - BWI
1 stop11h 13mFrontier
dom. 12/79:43 pmBWI - ISP
1 stop11h 30mFrontier
Deal found 10/29$160
This Kiwi.com deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 11/228:47 amISP - BWI
1 stop11h 03mFrontier
dom. 11/234:25 pmBWI - ISP
1 stop15h 37mFrontier
Deal found 10/29$161
This Kiwi.com deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/174:58 pmISP - BWI
1 stop17h 22mMultiple Airlines
mié. 11/194:52 pmBWI - ISP
1 stop16h 15mMultiple Airlines
Deal found 10/30$169
This Kiwi.com deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/174:58 pmISP - BWI
1 stop17h 22mFrontier
jue. 11/204:25 pmBWI - ISP
1 stop18h 12mFrontier
Deal found 10/29$172
This Kiwi.com deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 11/149:39 amISP - BWI
2 stops29h 56mMultiple Airlines
mar. 11/184:52 pmBWI - ISP
1 stop17h 45mMultiple Airlines
Deal found 10/30$174
This Kiwi.com deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 11/144:58 pmISP - BWI
1 stop16h 23mFrontier
mar. 11/1811:19 amBWI - ISP
1 stop23h 18mFrontier
Deal found 10/30$175
This Kiwi.com deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 11/169:27 pmISP - BWI
2 stops21h 08mFrontier
jue. 11/208:45 pmBWI - ISP
1 stop13h 52mFrontier
Deal found 10/30$183
This Trip.com deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 12/58:29 pmISP - DCA
2 stops20h 30mFrontier
dom. 12/72:00 pmDCA - ISP
2 stops19h 13mFrontier
Deal found 10/28$288
This JetBlue deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 11/2810:32 amISP - DCA
1 stop7h 03mJetBlue
sáb. 11/299:55 amDCA - ISP
1 stop8h 06mJetBlue
Deal found 10/30$326
This JetBlue deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/181:15 pmISP - DCA
1 stop9h 00mJetBlue
jue. 11/2010:45 amDCA - ISP
1 stop7h 16mJetBlue
Deal found 10/29$377
This Trip.com deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/1710:44 amISP - DCA
1 stop24h 11mJetBlue
mié. 11/1911:05 amDCA - ISP
1 stop22h 40mJetBlue
Deal found 10/30$393

Cheapflights Fare Finder

 
Customize your flight search to find flights from Islip to Washington, D.C. that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated octubre 30, 2025.
Use the filters below to find and compare flights from Islip to Washington, D.C. that are best for you.

Fly from

Islip

Fly to

Washington, D.C.

Route

Depart

Return

Price

IslipBaltimore

ISP - BWI

ISPBWI

Islip Long Island

jue. 11/13

6:37 pm-8:34 am

1 stop13h 57m

Baltimore/Washington

lun. 11/17

4:52 pm-5:42 pm

1 stop24h 50m

$159

IslipBaltimore

ISP - BWI

ISPBWI

Islip Long Island

lun. 11/17

4:58 pm-10:20 am

1 stop17h 22m

Baltimore/Washington

mié. 11/19

4:52 pm-9:07 am

1 stop16h 15m

$169

IslipBaltimore

ISP - BWI

ISPBWI

Islip Long Island

lun. 11/17

4:58 pm-10:20 am

1 stop17h 22m

Baltimore/Washington

jue. 11/20

4:25 pm-10:37 am

1 stop18h 12m

$172

IslipBaltimore

ISP - BWI

ISPBWI

Islip Long Island

vie. 11/14

9:39 am-3:35 pm

2 stops29h 56m

Baltimore/Washington

mar. 11/18

4:52 pm-10:37 am

1 stop17h 45m

$174

IslipBaltimore

ISP - BWI

ISPBWI

Islip Long Island

vie. 11/14

4:58 pm-9:21 am

1 stop16h 23m

Baltimore/Washington

mar. 11/18

11:19 am-10:37 am

1 stop23h 18m

$175

IslipBaltimore

ISP - BWI

ISPBWI

Islip Long Island

jue. 12/4

2:19 pm-7:42 am

2 stops17h 23m

Baltimore/Washington

lun. 12/8

9:11 pm-7:34 pm

1 stop22h 23m

$194

IslipBaltimore

ISP - BWI

ISPBWI

Islip Long Island

mar. 11/18

6:27 pm-3:50 pm

2 stops21h 23m

Baltimore/Washington

jue. 11/20

8:45 pm-10:37 am

1 stop13h 52m

$201

IslipBaltimore

ISP - BWI

ISPBWI

Islip Long Island

dom. 11/16

9:27 pm-6:35 pm

2 stops21h 08m

Baltimore/Washington

mié. 11/19

4:52 pm-9:07 am

1 stop16h 15m

$203

IslipBaltimore

ISP - BWI

ISPBWI

Islip Long Island

vie. 12/5

6:00 am-3:41 pm

1 stop9h 41m

Baltimore/Washington

dom. 12/7

9:43 pm-9:13 am

1 stop11h 30m

$206

IslipWashington, D.C.

ISP - DCA

ISPDCA

Islip Long Island

vie. 12/5

8:29 pm-4:59 pm

2 stops20h 30m

Washington, D.C. Reagan-National

dom. 12/7

2:00 pm-9:13 am

2 stops19h 13m

$288

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/30

Showing 1-10 of 37 results
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Compare providers for flights from Islip to Washington, D.C.

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
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*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice 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. flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Islip, New York-Washington, D.C. flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

What is the cheapest month to book a flight from Islip, New York to Washington, D.C.?

Currently, March is the cheapest month in which you can book a flight from Islip, New York to Washington, D.C. (average of $48). Flying from Islip, New York to Washington, D.C. in January is currently the most expensive (average of $197). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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

Find hourly flight availability from Islip to Washington, D.C.. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated octubre 30, 2025.

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 23% versus a flight at noon.

Reviews of airlines servicing Washington, D.C.

Get insights into the airlines that provide service to Washington, D.C.. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Washington, D.C.. Reviews last updated octubre 30, 2025.
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
8.0
Very good
4,243 reviews

Overall

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,243 reviews
Southwest
8.0
Very good
4,243 reviews

Overall

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Related info for your journey

Find useful and relevant information for your journey from Islip to Washington, D.C.. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • 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 9h. Fly via Frontier or JetBlue to get the fastest option. The distance between Islip, New York and Washington, D.C. is about 248 mi. This flight may include one or multiple stops.

  • 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.

  • What is the cheapest month to book a flight from Islip, New York to Washington, D.C.?

    Currently, March is the cheapest month in which you can book a flight from Islip, New York to Washington, D.C. (average of $48). Flying from Islip, New York to Washington, D.C. in January is currently the most expensive (average of $197). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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
Woodbridge
Tysons
Arlington
Springfield
Hanover
Silver Spring
Fairfax
Fredericksburg
Falls Church
Owings Mills
Linthicum Heights
Manassas
Largo
Oxon Hill
Laurel
Towson
National Harbor
Waldorf
Bowie

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Alternative routes for Islip to Washington, D.C.

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from Islip to Washington, D.C.

Discover the top airline that operate flights from Islip to Washington, D.C.. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated octubre 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$250Average$387FlexibilityNo cancel feeOn-time63%

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