How long is the flight from Washington, D.C. Reagan-National Airport to Islip, New York?

For as low as $357, Southwest can have you in Islip, New York from Washington, D.C. Reagan-National Airport in 7h 10m. The distance from Washington, D.C. Reagan-National Airport to Islip, New York is about 248 mi.

In terms of precipitation, rainfall in Islip, New York ranges from 3.3 - 4.4 inches per month. March is typically the wettest month, when rainfall can reach 4.4 in. February is typically the driest time to visit Islip, New York when rainfall is around 3.3 in.

If weather is an important factor for your trip to Islip, New York, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

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

When flying from Washington, D.C. Reagan-National Airport to Islip, New York, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Most accurate provider : When it comes to deals on Washington, D.C. Reagan-National Airport-Islip, New York flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C. Reagan-National Airport-Islip, New York flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C. Reagan-National Airport-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. Reagan-National Airport-Islip, New York flights, Cheapflights users trust FlightHub the most. FlightHub 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. Reagan-National Airport-Islip, New York flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

What airport do you fly into for flights to Islip from Washington, D.C. Reagan-National?

For a flight from Washington, D.C. Reagan-National to Islip, you will be flying into Long Island. Islip Long Island (ISP) is just 7.2 mi from the center of the city. Long Island is the only Islip airport and it handles 0 inbound flights from Washington, D.C. Reagan-National per day. 0 airlines have flights to Islip Long Island from Washington, D.C. Reagan-National on a regular basis.

Can I find deals for flights from Reagan-National to Islip that include hotel bookings?

Yes. In addition to deals on Reagan-National to Islip flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Reagan-National to Islip?

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

Can I find deals for business class flights from Reagan-National to Islip?

Yes. Cheapflights offers flight deals from Reagan-National 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.

$184+ Cheap Flights from Washington, D.C. Reagan-National Airport to Islip, NY

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Cheap flight deals from Reagan-National to Islip

Cheapest

Best

Last-minute

One-way

Cheapest flights from Reagan-National to Islip
Explore the most affordable flight options available from Reagan-National to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 8, 2026.

Wed 10/76:00 am -

1 stop7h 10m

Tue 10/134:20 pm -

1 stop6h 20m

Deal found 9/7

$357

Fri 9/256:00 am -

1 stop5h 55m

Sun 9/2710:30 am -

1 stop8h 20m

Deal found 9/3

$397

Fri 10/165:35 pm -

1 stop5h 40m

Mon 10/196:55 am -

1 stop9h 00m

Deal found 9/6

$422

Fri 10/25:35 pm -

1 stop5h 35m

Mon 10/56:55 am -

1 stop9h 00m

Deal found 9/7

$433

Sat 10/36:00 am -

2 stops9h 05m

Mon 10/56:55 am -

1 stop9h 00m

Deal found 9/7

$439

Thu 9/2412:55 pm -

1 stop8h 40m

Sat 9/266:00 am -

1 stop5h 55m

Deal found 9/4

$468

Sun 9/2012:55 pm -

1 stop10h 25m

Thu 9/245:00 pm -

1 stop6h 55m

Deal found 9/5

$483

Tue 11/247:15 am -

1 stop10h 05m

Mon 11/305:35 am -

1 stop9h 25m

Deal found 9/5

$493

Fri 10/27:00 pm -

1 stop28h 22m

Mon 10/54:26 pm -

1 stop22h 31m

Deal found 9/5

$509

Best flights from Reagan-National to Islip
Discover carefully curated flight deals from Reagan-National to Islip that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 8, 2026.

Wed 10/76:00 am -

1 stop7h 10m

Tue 10/134:20 pm -

1 stop6h 20m

Deal found 9/7

$357

Sat 10/176:00 am -

1 stop5h 40m

Tue 10/204:20 pm -

1 stop6h 20m

Deal found 9/6

$357

Fri 10/912:40 pm -

1 stop10h 35m

Sat 10/105:25 am -

1 stop5h 40m

Deal found 9/4

$362

Fri 10/25:35 pm -

1 stop5h 35m

Sat 10/35:25 am -

1 stop5h 40m

Deal found 9/6

$397

Fri 9/256:00 am -

1 stop5h 55m

Sun 9/2710:30 am -

1 stop8h 20m

Deal found 9/3

$397

Sat 9/2611:55 am -

1 stop7h 35m

Sun 9/2710:30 am -

1 stop8h 20m

Deal found 9/3

$397

Fri 10/165:35 pm -

1 stop5h 40m

Mon 10/196:55 am -

1 stop9h 00m

Deal found 9/6

$422

Sat 10/36:00 am -

1 stop5h 40m

Mon 10/56:55 am -

1 stop9h 00m

Deal found 9/7

$433

Thu 9/2412:55 pm -

1 stop8h 40m

Sat 9/266:00 am -

1 stop5h 55m

Deal found 9/7

$478

Sun 9/2012:55 pm -

1 stop10h 25m

Thu 9/245:00 pm -

1 stop6h 55m

Deal found 9/5

$483

Thu 10/812:40 pm -

1 stop10h 35m

Thu 10/156:55 am -

1 stop9h 00m

Deal found 9/8

$550

Last-minute flights from Reagan-National to Islip
Discover last-minute flight deals from Reagan-National to Islip. Data last updated September 8, 2026 and is based on user searches.

Sun 9/2012:55 pm -

1 stop10h 25m

Thu 9/245:00 pm -

1 stop6h 55m

Deal found 9/5

$483

Thu 9/2412:55 pm -

1 stop8h 40m

Sat 9/266:00 am -

1 stop5h 55m

Deal found 9/4

$468

Fri 9/256:00 am -

1 stop5h 55m

Sun 9/2710:30 am -

1 stop8h 20m

Deal found 9/3

$397

Fri 10/25:35 pm -

1 stop5h 35m

Mon 10/56:55 am -

1 stop9h 00m

Deal found 9/7

$433

Fri 10/27:00 pm -

1 stop28h 22m

Mon 10/54:26 pm -

1 stop22h 31m

Deal found 9/5

$509

Fri 10/27:00 pm -

1 stop28h 22m

Sun 10/47:00 am -

1 stop27h 01m

Deal found 9/4

$542

Sat 10/36:00 am -

2 stops9h 05m

Mon 10/56:55 am -

1 stop9h 00m

Deal found 9/7

$439

Wed 10/76:00 am -

1 stop7h 10m

Tue 10/134:20 pm -

1 stop6h 20m

Deal found 9/7

$357

Fri 10/165:35 pm -

1 stop5h 40m

Mon 10/196:55 am -

1 stop9h 00m

Deal found 9/6

$422

One-way flights from Reagan-National to Islip
Search for one-way flight options from Reagan-National to Islip. Find affordable one-way fares based on user searches. Data last updated September 8, 2026.

Wed 11/257:15 am -

1 stop10h 05m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/7

$184

Mon 10/265:35 pm -

1 stop5h 40m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/7

$199

Mon 11/234:55 pm -

1 stop5h 50m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/3

$214

Tue 11/247:15 am -

1 stop10h 05m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/7

$219

Mon 9/216:00 am -

1 stop5h 55m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/7

$239

Mon 9/211:06 pm -

3 stops23h 52m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/7

$242

Mon 10/267:00 am -

3 stops28h 20m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/7

$246

Mon 9/211:06 pm -

2 stops27h 52m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/7

$250

Tue 9/157:00 am -

3 stops28h 20m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/6

$269

Tue 9/156:00 pm -

2 stops22h 58m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/6

$272

Thu 10/812:40 pm -

1 stop10h 35m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/8

$275

Find flight deals from Reagan-National to Islip

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$357 (Southwest)
One-way from	$184 (Southwest)
Popular in	August
Cheapest in	November
Average price	$254

Provider with most accurate pricing for Washington, D.C. Reagan-National-Islip Long Island flight deals.

Search Deals

Provider most trusted by Cheapflights users for Washington, D.C. Reagan-National-Islip Long Island flights.

Search Deals

From Washington, D.C. Reagan-National to Islip Long Island

Search Deals

One-way flight from Washington, D.C. Reagan-National to Islip Long Island

Search Deals

Highest demand for flights based on searches. 11% potential increase in price ($30 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 September 2026

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from Washington, D.C. Reagan-National Airport to Islip that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

Washington, D.C.Islip

DCA Washington, D.C. Reagan-National - ISP Islip Long Island

DCAISP

Washington, D.C. Reagan-National

Mon 10/26

5:35 pm-11:15 pm

1 stop5h 40m

Islip Long Island

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$199

Washington, D.C.Islip

DCA Washington, D.C. Reagan-National - ISP Islip Long Island

DCAISP

Washington, D.C. Reagan-National

Mon 11/23

4:55 pm-10:45 pm

1 stop5h 50m

Islip Long Island

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$214

Washington, D.C.Islip

DCA Washington, D.C. Reagan-National - ISP Islip Long Island

DCAISP

Washington, D.C. Reagan-National

Mon 9/21

6:00 am-11:55 am

1 stop5h 55m

Islip Long Island

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$239

Washington, D.C.Islip

DCA Washington, D.C. Reagan-National - ISP Islip Long Island

DCAISP

Washington, D.C. Reagan-National

Tue 9/15

7:00 am-11:20 am

3 stops28h 20m

Islip Long Island

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$269

Washington, D.C.Islip

DCA Washington, D.C. Reagan-National - ISP Islip Long Island

DCAISP

Washington, D.C. Reagan-National

Tue 9/15

6:00 am-2:55 pm

1 stop8h 55m

Islip Long Island

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$324

Washington, D.C.Islip

DCA Washington, D.C. Reagan-National - ISP Islip Long Island

DCAISP

Washington, D.C. Reagan-National

Wed 10/7

6:00 am-1:10 pm

1 stop7h 10m

Islip Long Island

Tue 10/13

4:20 pm-10:40 pm

1 stop6h 20m

$357

Washington, D.C.Islip

DCA Washington, D.C. Reagan-National - ISP Islip Long Island

DCAISP

Washington, D.C. Reagan-National

Sat 10/17

6:00 am-11:40 am

1 stop5h 40m

Islip Long Island

Tue 10/20

4:20 pm-10:40 pm

1 stop6h 20m

$357

Washington, D.C.Islip

DCA Washington, D.C. Reagan-National - ISP Islip Long Island

DCAISP

Washington, D.C. Reagan-National

Fri 10/9

12:40 pm-11:15 pm

1 stop10h 35m

Islip Long Island

Sat 10/10

5:25 am-11:05 am

1 stop5h 40m

$362

Washington, D.C.Islip

DCA Washington, D.C. Reagan-National - ISP Islip Long Island

DCAISP

Washington, D.C. Reagan-National

Fri 10/2

5:35 pm-11:10 pm

1 stop5h 35m

Islip Long Island

Sat 10/3

5:25 am-11:05 am

1 stop5h 40m

$397

Washington, D.C.Islip

DCA Washington, D.C. Reagan-National - ISP Islip Long Island

DCAISP

Washington, D.C. Reagan-National

Fri 9/25

6:00 am-11:55 am

1 stop5h 55m

Islip Long Island

Sun 9/27

10:30 am-6:50 pm

1 stop8h 20m

$397

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/7

Showing 1-10 of 22 resultsSorted by cheapest first

Compare providers for flights from Reagan-National to Islip

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Reagan-National to Islip in September.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust 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 Washington, D.C. Reagan-National Airport-Islip, New York flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C. Reagan-National Airport-Islip, New York flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C. Reagan-National Airport-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. Reagan-National Airport-Islip, New York flights, Cheapflights users trust FlightHub the most. FlightHub 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. Reagan-National Airport-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 Reagan-National to Islip

Have a flexible travel schedule? Discover the best time to fly to Islip from Reagan-National with our price prediction graph.

DCA-ISP

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.

Related info for your journey

What airport do you fly into for flights to Islip from Washington, D.C. Reagan-National?
For a flight from Washington, D.C. Reagan-National to Islip, you will be flying into Long Island. Islip Long Island (ISP) is just 7.2 mi from the center of the city. Long Island is the only Islip airport and it handles 0 inbound flights from Washington, D.C. Reagan-National per day. 0 airlines have flights to Islip Long Island from Washington, D.C. Reagan-National on a regular basis.
How long is the flight from Washington, D.C. Reagan-National Airport to Islip, New York?
For as low as $357, Southwest can have you in Islip, New York from Washington, D.C. Reagan-National Airport in 7h 10m. The distance from Washington, D.C. Reagan-National Airport to Islip, New York is about 248 mi.
Can I find deals for flights from Reagan-National to Islip that include hotel bookings?
Yes. In addition to deals on Reagan-National to Islip flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Reagan-National to Islip?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Reagan-National to Islip.
Can I find deals for business class flights from Reagan-National to Islip?
Yes. Cheapflights offers flight deals from Reagan-National 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.

See more FAQs

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$184+ Cheap flights from Reagan-National (DCA) to Islip, NY (ISP)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/25. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheap flight deals from Reagan-National to Islip

Cheapest flights from Reagan-National to IslipExplore the most affordable flight options available from Reagan-National to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 8, 2026.

Explore the most affordable flight options available from Reagan-National to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 8, 2026.

Best flights from Reagan-National to IslipDiscover carefully curated flight deals from Reagan-National to Islip that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 8, 2026.

Discover carefully curated flight deals from Reagan-National to Islip that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 8, 2026.

Last-minute flights from Reagan-National to IslipDiscover last-minute flight deals from Reagan-National to Islip. Data last updated September 8, 2026 and is based on user searches.

Discover last-minute flight deals from Reagan-National to Islip. Data last updated September 8, 2026 and is based on user searches.

One-way flights from Reagan-National to IslipSearch for one-way flight options from Reagan-National to Islip. Find affordable one-way fares based on user searches. Data last updated September 8, 2026.

Search for one-way flight options from Reagan-National to Islip. Find affordable one-way fares based on user searches. Data last updated September 8, 2026.

Find flight deals from Reagan-National to Islip

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Cheapflights Fare Finder

Use the filters below to find and compare flights from Washington, D.C. Reagan-National Airport to Islip that are best for you.

Compare providers for flights from Reagan-National 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 Reagan-National to Islip in September.

Best time to book a flight from Reagan-National to Islip

Have a flexible travel schedule? Discover the best time to fly to Islip from Reagan-National with our price prediction graph.

Related info for your journey

What airport do you fly into for flights to Islip from Washington, D.C. Reagan-National?

How long is the flight from Washington, D.C. Reagan-National Airport to Islip, New York?

Can I find deals for flights from Reagan-National to Islip that include hotel bookings?

How can I find direct flights from Reagan-National to Islip?

Can I find deals for business class flights from Reagan-National to Islip?

Traveling to a place near Islip?

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Search flights from Reagan-National to Islip by cabin class

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Other flights to Islip

Explore flights to Islip departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 8, 2026.

Reagan-National and Islip flights

Browse other Reagan-National and Islip flight options. Last updated on September 8, 2026.

Other flights from Reagan-National

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Cheapest flights from Reagan-National to Islip
Explore the most affordable flight options available from Reagan-National to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 8, 2026.

Best flights from Reagan-National to Islip
Discover carefully curated flight deals from Reagan-National to Islip that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 8, 2026.

Last-minute flights from Reagan-National to Islip
Discover last-minute flight deals from Reagan-National to Islip. Data last updated September 8, 2026 and is based on user searches.

One-way flights from Reagan-National to Islip
Search for one-way flight options from Reagan-National to Islip. Find affordable one-way fares based on user searches. Data last updated September 8, 2026.