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Islip

$53+ Cheap flights from Washington, D.C. (WAS) to Islip, NY (ISP)

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 1/5. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — ISP
dic. 5 — dic. 121
vie. 12/5
vie. 12/12
1 adult, Economy
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Find flight deals from Washington, D.C. to Islip

Cheapest flights from Washington, D.C. to Islip
Explore the most affordable flight options available from Washington, D.C. to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on noviembre 5, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/2. 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.
mar. 12/27:30 amBWI - ISP
1 stop12h 04mMultiple Airlines
mar. 12/98:29 pmISP - BWI
1 stop12h 53mMultiple Airlines
Deal found 11/2$132
This Southwest deal was found by Cheapflights users on 11/4. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 12/68:35 pmBWI - ISP
Nonstop1h 10mSouthwest
mar. 12/95:40 amISP - BWI
Nonstop1h 20mSouthwest
Deal found 11/4$144
This Kiwi.com deal was found by Cheapflights users on 11/4. 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. 11/2112:57 pmBWI - ISP
1 stop19h 05mFrontier
jue. 12/410:19 amISP - BWI
1 stop9h 57mFrontier
Deal found 11/4$146
This Kiwi.com deal was found by Cheapflights users on 11/4. 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. 11/2010:41 amBWI - ISP
1 stop23h 56mMultiple Airlines
lun. 11/249:02 amISP - BWI
1 stop8h 22mMultiple Airlines
Deal found 11/4$154
This Kiwi.com deal was found by Cheapflights users on 11/3. 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.
mar. 11/1811:19 amBWI - ISP
1 stop23h 18mMultiple Airlines
sáb. 11/228:47 amISP - BWI
1 stop8h 37mMultiple Airlines
Deal found 11/3$161
This Frontier deal was found by Cheapflights users on 11/3. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/242:11 pmIAD - ISP
1 stop9h 48mFrontier
sáb. 12/610:19 amISP - IAD
1 stop10h 05mFrontier
Deal found 11/3$190
This Kiwi.com deal was found by Cheapflights users on 11/3. 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.
mar. 11/1811:19 amBWI - ISP
1 stop23h 18mFrontier
sáb. 11/226:00 amISP - BWI
2 stops17h 58mFrontier
Deal found 11/3$195
This Frontier deal was found by Cheapflights users on 11/3. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/258:44 amIAD - ISP
1 stop11h 30mFrontier
sáb. 12/610:19 amISP - IAD
1 stop10h 05mFrontier
Deal found 11/3$210
This Priceline deal was found by Cheapflights users on 11/5. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/69:52 pmIAD - ISP
1 stop11h 02mFrontier
jue. 11/139:54 amISP - IAD
1 stop11h 03mFrontier
Deal found 11/5$240
This Trip.com deal was found by Cheapflights users on 11/3. 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. 12/87:00 amDCA - ISP
1 stop7h 13mJetBlue
mié. 12/1011:50 amISP - DCA
1 stop7h 05mJetBlue
Deal found 11/3$290
This Frontier deal was found by Cheapflights users on 11/3. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/242:11 pmIAD - ISP
1 stop9h 48mFrontier
mar. 11/259:09 pmISP - IAD
1 stop10h 36mFrontier
Deal found 11/3$290
This Frontier deal was found by Cheapflights users on 11/3. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 11/215:26 pmIAD - ISP
1 stop6h 33mFrontier
sáb. 12/610:19 amISP - IAD
1 stop10h 05mFrontier
Deal found 11/3$320

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

Discover tips and strategies to find the most affordable flight options for your journey from Washington, D.C. (WAS) to Islip (ISP). 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 noviembre 5, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$142
(Kiwi.com)

One-way from

$53
(Trip.com)

Popular in

October

Cheapest in

April

Average price

$414

Good round-trip deal

$470 or less
Provider with most accurate pricing for Washington, D.C. (WAS)-Islip Long Island flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Islip Long Island flights.
Search Deals
From Washington, D.C. (WAS) to Islip Long Island
Search Deals
One-way flight from Washington, D.C. (WAS) to Islip Long Island
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($104 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals
Price to beat on a round-trip flight from Washington, D.C. (WAS) to Islip Long Island.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington, D.C. to Islip 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 noviembre 5, 2025.
Use the filters below to find and compare flights from Washington, D.C. to Islip that are best for you.

Fly from

Washington, D.C.

Fly to

Islip

Route

Depart

Return

Price

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

mié. 11/26

8:45 pm-9:07 am

1 stop12h 22m

Islip Long Island

mié. 12/3

6:00 am-1:21 pm

1 stop7h 21m

$154

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

jue. 11/20

10:41 am-10:37 am

1 stop23h 56m

Islip Long Island

lun. 11/24

9:02 am-5:24 pm

1 stop8h 22m

$154

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

mar. 12/2

7:30 am-7:34 pm

1 stop12h 04m

Islip Long Island

mar. 12/9

8:29 pm-12:24 am

2 stops27h 55m

$160

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

mar. 11/18

11:19 am-10:37 am

1 stop23h 18m

Islip Long Island

sáb. 11/22

8:47 am-5:24 pm

1 stop8h 37m

$161

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

vie. 11/21

12:57 pm-8:02 am

1 stop19h 05m

Islip Long Island

jue. 12/4

1:15 pm-12:24 am

2 stops11h 09m

$175

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

lun. 11/24

2:11 pm-11:59 pm

1 stop9h 48m

Islip Long Island

sáb. 12/6

10:19 am-8:24 pm

1 stop10h 05m

$190

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

mié. 11/26

10:45 pm-11:55 pm

Nonstop1h 10m

Islip Long Island

mié. 12/3

5:40 am-7:00 am

Nonstop1h 20m

$239

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

mar. 11/11

11:19 am-10:37 am

1 stop23h 18m

Islip Long Island

jue. 11/13

11:40 am-8:34 am

2 stops20h 54m

$240

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

mar. 11/11

11:19 am-10:37 am

1 stop23h 18m

Islip Long Island

jue. 11/13

6:37 pm-8:34 am

1 stop13h 57m

$251

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

mar. 12/2

8:55 pm-10:05 pm

Nonstop1h 10m

Islip Long Island

mar. 12/9

5:40 am-7:00 am

Nonstop1h 20m

$261

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/3

Showing 1-10 of 59 results
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Compare providers for flights from Washington, D.C. to Islip

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 Washington, D.C. to Islip in November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star

*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 Washington, D.C.-Islip, New York flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Washington, D.C.-Islip, New York flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Washington, D.C.-Islip, New York flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C.-Islip, New York 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 Washington, D.C.-Islip, New York 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 Washington, D.C. to Islip

Have a flexible travel schedule? Discover the best time to fly to Islip from Washington, D.C. 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 Washington, D.C. to Islip

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

Currently, April is the cheapest month in which you can book a flight from Washington, D.C. to Islip, New York (average of $54). Flying from Washington, D.C. to Islip, New York in January is currently the most expensive (average of $148). 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 WAS to ISP?

Find hourly flight availability from Washington, D.C. to Islip. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated noviembre 5, 2025.

When flying from Washington, D.C. to Islip, New York, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 36% versus a flight at noon.

Reviews of airlines servicing Islip

Get insights into the airlines that provide service to Islip. 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 Islip. Reviews last updated noviembre 5, 2025.
Read through reviews of airlines operating flights from Washington, D.C. to Islip, such as Southwest. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,240 reviews

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Overall

8.0

Crew

8.6

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
4,240 reviews
Southwest
8.0
Very good
4,240 reviews

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Overall

8.0

Crew

8.6

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 Washington, D.C. to Islip. 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 into for flights to Islip from 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 Islip from Washington, D.C.. Booking flights from Washington, D.C. to Long Island (ISP) should be relatively easy as there are 0 daily inbound flights from Washington, D.C. from 1 airline.

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

    For as low as $347, Frontier can have you in Islip, New York from Washington, D.C. in 5h 35m. There are 248 mi between Washington, D.C. and Islip, New York. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from Washington, D.C. to Islip, New York one-way?

    $59 is the cheapest one-way deal found within the past few days, from Southwest. You may also be able to find cheap deals on Frontier and JetBlue, with prices starting from $65 and $119, respectively.

  • What are the most popular routes from Washington, D.C. to Islip, New York?

    When deciding which route to take from Washington, D.C. to Islip, New York consider Baltimore/Washington - Islip Long Island, Washington, D.C. Dulles Intl - Islip Long Island or Washington, D.C. Reagan-National - Islip Long Island as they are the most popular.

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

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

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

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

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

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

    Currently, April is the cheapest month in which you can book a flight from Washington, D.C. to Islip, New York (average of $54). Flying from Washington, D.C. to Islip, New York in January is currently the most expensive (average of $148). 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 Islip?

Book flights to Islip if you plan to visit one of these locations
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Alternative routes for Washington, D.C. to Islip

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

Discover the top airline that operate flights from Washington, D.C. to Islip. 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 noviembre 5, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$231Average$385FlexibilityNo cancel feeOn-time63%

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