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Islip

$88+ 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 8/16. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — ISP
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
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 July 31, 2025.

Round-trip from

$195
(FlightHub)

One-way from

$88
(Cheapflightsfares)

Popular in

December

Cheapest in

April

Average price

$217
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. 19% potential increase in price ($50 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 July 31, 2025.

This FlightHub deal was found by Cheapflights users on 7/31. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/219:33 pmIAD - ISP
1 stop11h 40mFrontier
Sat 8/232:49 pmISP - IAD
1 stop26h 49mFrontier
Deal found 7/31$195
This Expedia deal was found by Cheapflights users on 7/29. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/86:19 amDCA - ISP
2 stops9h 04mJetBlue
Wed 9/1011:35 amISP - DCA
1 stop9h 19mJetBlue
Deal found 7/29$299
This Southwest deal was found by Cheapflights users on 7/31. 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 9/166:55 amDCA - ISP
1 stop6h 20mSouthwest
Tue 9/164:00 pmISP - DCA
1 stop6h 00mSouthwest
Deal found 7/31$307
This United deal was found by Cheapflights users on 7/31. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/310:18 pmIAD - ISP
1 stop12h 40mMultiple Airlines
Fri 9/57:30 amISP - IAD
1 stop7h 13mMultiple Airlines
Deal found 7/31$699
This United deal was found by Cheapflights users on 7/31. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/310:11 amDCA - ISP
2 stops9h 50mMultiple Airlines
Fri 9/57:30 amISP - DCA
2 stops10h 12mMultiple Airlines
Deal found 7/31$730

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 July 31, 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 8/21

9:33 pm-9:13 am

1 stop11h 40m

Islip Long Island

Sat 8/23

2:49 pm-5:38 pm

1 stop26h 49m

$195

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Mon 9/8

6:19 am-3:23 pm

2 stops9h 04m

Islip Long Island

Wed 9/10

11:35 am-8:54 pm

1 stop9h 19m

$299

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Tue 9/16

6:55 am-1:15 pm

1 stop6h 20m

Islip Long Island

Tue 9/16

4:00 pm-10:00 pm

1 stop6h 00m

$307

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Wed 9/3

10:18 pm-10:58 am

1 stop12h 40m

Islip Long Island

Fri 9/5

7:30 am-2:43 pm

1 stop7h 13m

$699

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Wed 9/3

10:11 am-8:01 pm

2 stops9h 50m

Islip Long Island

Fri 9/5

7:30 am-5:42 pm

2 stops10h 12m

$730

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Sat 8/16

1:37 pm-7:42 pm

1 stop6h 05m

$88

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Mon 9/1

7:40 am-10:34 am

1 stop26h 54m

$157

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Thu 8/14

6:55 am-3:35 pm

1 stop8h 40m

$244

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Sat 8/30

8:12 pm-6:59 pm

3 stops22h 47m

$304

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

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, January is the cheapest month in which you can book a flight from District of Columbia to Islip, New York (average of $108). Flying from District of Columbia to Islip, New York in November is currently the most expensive (average of $213). 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 July 31, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from District of Columbia to Islip, New York as you normally would.

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 July 31, 2025.
Peruse reviews from past customers who have flown with Southwest, JetBlue, and Frontier from District of Columbia to Islip to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Comfort

8.0

Boarding

8.1

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Southwest
8.0
Very good
4,246 reviews
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Comfort

8.0

Boarding

8.1

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
JetBlue
7.3
Good
2,914 reviews
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Comfort

8.0

Boarding

8.1

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Frontier
5.9
Fair
3,239 reviews
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Comfort

8.0

Boarding

8.1

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.

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 popular is this District of Columbia to Islip, New York flight route?

    Within the past month, 3 users have taken a look at flights from District of Columbia to Islip Long Island.

  • What are the cheapest airlines to fly from District of Columbia to Islip, New York one-way?

    One-way options have recently been found by users for as low as $88 on Frontier. Other airlines that offer cheap prices include Southwest from $99 and JetBlue from $157 one-way.

  • What are the cheapest flights from District of Columbia to Islip, New York?

    On average you can expect to pay $362 for a flight from District of Columbia to Islip, New York. The cheapest flight overall is $108 while the most popular route, (Washington, D.C. Dulles Intl - Islip Long Island) is currently priced at $195.

  • 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, January is the cheapest month in which you can book a flight from District of Columbia to Islip, New York (average of $108). Flying from District of Columbia to Islip, New York in November is currently the most expensive (average of $213). 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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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 July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$244Average$366FlexibilityNo cancel feeOn-time63%

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