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Islip

$90+ Cheap flights from District of Columbia 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 1/16. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — ISP
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap flight deals from District of Columbia to Islip

Cheapest flights from District of Columbia to Islip
Explore the most affordable flight options available from District of Columbia to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.

This Kiwi.com deal was found by Cheapflights users on 12/17. 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.
Tue 12/309:58 pmIAD - ISP
1 stop18h 39mFrontier
Fri 1/22:04 pmISP - IAD
1 stop7h 09mFrontier
Deal found 12/17$542
This Southwest deal was found by Cheapflights users on 12/16. 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.
Sun 12/286:55 amDCA - ISP
1 stop7h 05mSouthwest
Wed 12/313:40 pmISP - DCA
1 stop6h 55mSouthwest
Deal found 12/16$637
This Southwest deal was found by Cheapflights users on 12/16. 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.
Thu 12/256:55 amDCA - ISP
1 stop5h 35mSouthwest
Fri 12/261:35 pmISP - DCA
1 stop7h 10mSouthwest
Deal found 12/16$817
This JetBlue deal was found by Cheapflights users on 12/17. 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.
Thu 12/189:49 amDCA - ISP
1 stop8h 56mJetBlue
Fri 12/1910:46 amISP - DCA
1 stop6h 34mJetBlue
Deal found 12/17$929
This Frontier deal was found by Cheapflights users on 12/17. 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.
Mon 12/2210:43 amIAD - ISP
1 stop13h 16mFrontier
Mon 12/292:04 pmISP - IAD
1 stop6h 59mFrontier
Deal found 12/17$998
This JetBlue deal was found by Cheapflights users on 12/17. 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.
Sun 12/2112:05 pmDCA - ISP
1 stop6h 40mJetBlue
Mon 12/2210:46 amISP - DCA
1 stop6h 34mJetBlue
Deal found 12/17$1,000
This Priceline deal was found by Cheapflights users on 12/16. 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.
Sun 12/286:15 amDCA - ISP
2 stops9h 55mMultiple Airlines
Wed 12/3110:46 amISP - DCA
2 stops10h 04mMultiple Airlines
Deal found 12/16$1,026
This JetBlue deal was found by Cheapflights users on 12/17. 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.
Tue 12/2312:05 pmDCA - ISP
1 stop6h 40mJetBlue
Thu 12/2510:46 amISP - DCA
1 stop6h 34mJetBlue
Deal found 12/17$1,124
This Kiwi.com deal was found by Cheapflights users on 12/16. 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.
Thu 12/259:41 amIAD - ISP
1 stop13h 50mFrontier
Fri 12/262:04 pmISP - IAD
1 stop7h 09mFrontier
Deal found 12/16$1,282
This Kiwi.com deal was found by Cheapflights users on 12/16. 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.
Thu 12/257:11 pmIAD - ISP
2 stops15h 54mMultiple Airlines
Fri 12/262:04 pmISP - IAD
1 stop7h 09mMultiple Airlines
Deal found 12/16$1,346
This JetBlue deal was found by Cheapflights users on 12/17. 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.
Mon 12/229:49 amDCA - ISP
1 stop8h 56mJetBlue
Mon 12/2910:46 amISP - DCA
1 stop6h 34mJetBlue
Deal found 12/17$1,359
This JetBlue deal was found by Cheapflights users on 12/17. 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.
Thu 12/259:49 amDCA - ISP
1 stop8h 56mJetBlue
Fri 12/2610:46 amISP - DCA
1 stop6h 34mJetBlue
Deal found 12/17$1,431

Find flight deals from District of Columbia to Islip

Keep the following information in mind while searching for District of Columbia to Islip flight deals. Data was last updated December 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$183
(Frontier)

One-way from

$90
(Kiwi.com)

Popular in

October

Cheapest in

April

Average price

$187
Provider with most accurate pricing for Washington, D.C. (WAS)-New York (NYC) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-New York (NYC) flights.
Search Deals
From District of Columbia to Islip Long Island
Search Deals
One-way flight from District of Columbia to Islip Long Island
Search Deals
Highest demand for flights based on searches. 0% potential increase in price ($1 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($5 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from District of Columbia 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 December 18, 2025.
Use the filters below to find and compare flights from District of Columbia to Islip that are best for you.

Fly from

District of Columbia

Fly to

Islip

Route

Depart

Return

Price

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Thu 1/15

8:49 am-7:03 pm

1 stop10h 14m

Islip Long Island

Thu 1/22

7:43 pm-8:40 am

1 stop12h 57m

$183

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Thu 1/8

3:21 pm-1:21 pm

2 stops22h 00m

Islip Long Island

Sun 1/11

8:40 pm-7:40 am

1 stop11h 00m

$214

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Thu 1/1

9:41 am-11:31 pm

1 stop13h 50m

Islip Long Island

Mon 1/5

4:40 pm-11:28 am

2 stops18h 48m

$323

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Thu 1/15

7:30 am-1:30 pm

1 stop6h 00m

Islip Long Island

Thu 1/22

9:15 am-6:00 pm

2 stops8h 45m

$362

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Fri 5/15

6:00 am-12:05 pm

1 stop6h 05m

Islip Long Island

Sun 5/17

5:15 am-12:00 pm

1 stop6h 45m

$408

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Sat 1/3

9:48 am-11:59 pm

1 stop14h 11m

Islip Long Island

Tue 1/6

12:00 pm-11:28 am

2 stops23h 28m

$428

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Tue 12/30

9:58 pm-4:37 pm

1 stop18h 39m

Islip Long Island

Fri 1/2

2:04 pm-9:13 pm

1 stop7h 09m

$542

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Thu 1/8

2:10 pm-11:15 am

1 stop21h 05m

Islip Long Island

Sun 1/11

11:55 am-2:18 pm

3 stops26h 23m

$630

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Sun 12/28

6:55 am-2:00 pm

1 stop7h 05m

Islip Long Island

Wed 12/31

3:40 pm-10:35 pm

1 stop6h 55m

$637

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Thu 1/1

2:00 pm-7:45 pm

1 stop5h 45m

Islip Long Island

Mon 1/5

7:40 pm-9:15 am

1 stop13h 35m

$679

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Showing 1-10 of 21 results
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Best time to book a flight from District of Columbia to Islip

Have a flexible travel schedule? Discover the best time to fly to Islip from District of Columbia 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 District of Columbia to Islip

What is the cheapest month to book a flight from District of Columbia to Islip, New York?

Currently, April is the cheapest month in which you can book a flight from District of Columbia to Islip, New York (average of $54). Flying from District of Columbia to Islip, New York in January is currently the most expensive (average of $118). 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 DC to ISP?

Find hourly flight availability from District of Columbia 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 December 18, 2025.

When flying from District of Columbia 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.

Related info for your journey

Find useful and relevant information for your journey from District of Columbia 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 District of Columbia?

    If you book a flight to Islip from District of Columbia, you will be flying to Long Island, which is the city’s only airport. Islip Long Island (ISP) is located 7.2 mi from the center of Islip.

  • How long is the flight from District of Columbia to Islip, New York?

    A quick flight from District of Columbia to Islip, New York can take about 6h. Frontier provides one of the quickest options available for as low as $362. The distance from District of Columbia to Islip, New York is about 248 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • Can I find deals for flights from District of Columbia to Islip that include hotel bookings?

    Yes. In addition to deals on District of Columbia to Islip flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from District of Columbia to Islip?

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

  • Can I find deals for business class flights from District of Columbia to Islip?

    Yes. Cheapflights offers flight deals from District of Columbia 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 District of Columbia to Islip, New York?

    Currently, April is the cheapest month in which you can book a flight from District of Columbia to Islip, New York (average of $54). Flying from District of Columbia to Islip, New York in January is currently the most expensive (average of $118). 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
Riverhead

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Alternative routes for District of Columbia to Islip

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Top airline flying from District of Columbia to Islip

Discover the top airline that operate flights from District of Columbia 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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$231Average$381FlexibilityNo cancel feeOn-time63%

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