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Islip

$63+ 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 1/17. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — ISP
Dec 3 — Dec 101
Wed 12/3
Wed 12/10
1 adult, Economy
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Cheap 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 November 3, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$177
(Kiwi.com)

One-way from

$63
(Trip.com)

Popular in

October

Cheapest in

April

Average price

$237
Provider with most accurate pricing for Washington, D.C. (WAS)-New York (NYC) flight deals.
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Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-New York (NYC) flights.
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From District of Columbia to Islip Long Island
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One-way flight from District of Columbia to Islip Long Island
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Highest demand for flights based on searches. 7% potential increase in price ($18 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Find 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 November 3, 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.
Mon 11/178:37 pmIAD - ISP
1 stop21h 05mFrontier
Tue 12/28:29 pmISP - IAD
2 stops18h 00mFrontier
Deal found 11/2$177
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.
Mon 12/87:00 amDCA - ISP
1 stop7h 13mJetBlue
Wed 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.
Mon 11/242:11 pmIAD - ISP
1 stop9h 48mFrontier
Tue 11/259:09 pmISP - IAD
1 stop10h 36mFrontier
Deal found 11/3$290
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/26:55 amDCA - ISP
1 stop5h 35mSouthwest
Tue 12/93:40 pmISP - DCA
1 stop7h 10mSouthwest
Deal found 11/2$347
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/116:55 amDCA - ISP
1 stop5h 35mSouthwest
Mon 12/153:40 pmISP - DCA
1 stop7h 10mSouthwest
Deal found 11/2$378
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.
Thu 11/1311:10 amIAD - ISP
1 stop6h 45mMultiple Airlines
Fri 11/149:39 amISP - IAD
2 stops14h 32mMultiple Airlines
Deal found 11/3$385
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/267:30 amDCA - ISP
1 stop9h 35mSouthwest
Wed 12/33:40 pmISP - DCA
1 stop7h 10mSouthwest
Deal found 11/3$392
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/242:11 pmIAD - ISP
1 stop9h 48mFrontier
Wed 11/266:00 amISP - IAD
1 stop10h 31mFrontier
Deal found 11/2$405
This Southwest deal was found by Cheapflights users on 11/1. 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.
Sat 11/297:20 amDCA - ISP
1 stop7h 20mSouthwest
Sat 12/61:30 pmISP - DCA
2 stops7h 40mSouthwest
Deal found 11/1$412
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/1610:54 pmIAD - ISP
1 stop10h 15mFrontier
Sun 11/236:00 amISP - IAD
1 stop10h 31mFrontier
Deal found 11/2$420
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/215:26 pmIAD - ISP
1 stop6h 33mFrontier
Sun 11/236:00 amISP - IAD
1 stop10h 31mFrontier
Deal found 11/2$440
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.
Wed 11/267:05 amIAD - ISP
2 stops13h 00mMultiple Airlines
Wed 12/312:37 pmISP - IAD
1 stop19h 49mMultiple Airlines
Deal found 11/3$453

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 November 3, 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

Mon 11/17

8:37 pm-5:42 pm

1 stop21h 05m

Islip Long Island

Tue 12/2

8:29 pm-2:29 pm

2 stops18h 00m

$177

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Mon 12/8

7:00 am-2:13 pm

1 stop7h 13m

Islip Long Island

Wed 12/10

11:50 am-6:55 pm

1 stop7h 05m

$290

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Mon 11/24

2:11 pm-11:59 pm

1 stop9h 48m

Islip Long Island

Tue 11/25

9:09 pm-7:45 am

1 stop10h 36m

$290

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Tue 12/2

6:55 am-12:30 pm

1 stop5h 35m

Islip Long Island

Tue 12/9

3:40 pm-10:50 pm

1 stop7h 10m

$347

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Thu 12/11

6:55 am-12:30 pm

1 stop5h 35m

Islip Long Island

Mon 12/15

3:40 pm-10:50 pm

1 stop7h 10m

$378

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Wed 11/26

7:30 am-5:05 pm

1 stop9h 35m

Islip Long Island

Wed 12/3

3:40 pm-10:50 pm

1 stop7h 10m

$392

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Mon 11/24

2:11 pm-11:59 pm

1 stop9h 48m

Islip Long Island

Wed 11/26

6:00 am-4:31 pm

1 stop10h 31m

$405

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Sat 11/29

7:20 am-2:40 pm

1 stop7h 20m

Islip Long Island

Sat 12/6

1:30 pm-9:10 pm

2 stops7h 40m

$412

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Sun 11/16

10:54 pm-9:09 am

1 stop10h 15m

Islip Long Island

Sun 11/23

6:00 am-4:31 pm

1 stop10h 31m

$420

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Thu 11/20

6:55 am-12:30 pm

1 stop5h 35m

Islip Long Island

Thu 11/20

3:40 pm-10:50 pm

1 stop7h 10m

$429

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/1

Showing 1-10 of 31 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 $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 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 November 3, 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 5h 35m. Frontier provides one of the quickest options available for as low as $347. 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 $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
Riverhead
Southampton

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Alternative routes for District of Columbia 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 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 November 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$231Average$385FlexibilityNo cancel feeOn-time63%

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