What is the cheapest airline that flies from Washington, D.C. to Islip Long Island?

Frontier, JetBlue, and Breeze Airways are the most popular carriers operating from Washington, D.C. to Islip Long Island

How long does it take to fly to Islip, New York?

The flight from Washington, D.C. to Islip, New York depends on which airports you’re departing and arriving from and whether or not you have a layover. If you fly from Washington, D.C. (a popular airport in Washington, D.C.) to New York John F Kennedy Intl Airport (the most popular airport in Islip, New York), then the flight time is 1h 17m on average. If you fly from Baltimore (another popular airport in Washington, D.C.) to New York John F Kennedy Intl Airport, then the average flight time is 4h 24m.

What airlines fly to Islip, New York?

United Airlines, Delta and American Airlines are the top three most popular airlines that fly to Islip, New York from Washington, D.C. according to our data. United Airlines is the first choice among our users, with 39% of people opting to fly with this airline when traveling to Islip, New York. Keep in mind that there are 5 different airlines that fly to Islip, New York on a routine basis, so you have a few additional options to choose from.

How many flights depart from Washington, D.C. to Islip, New York on average per week?

As of March 2026, 3 flights take off from Washington, D.C. and land in Islip, New York each week. The most common flight departure day for this route is Mon, with 100% of weekly flights taking off on this day.

When did momondo last update prices for flights from Washington, D.C. to Islip Long Island Airport?

Prices for flights from Washington, D.C. to Islip Long Island Airport are refreshed on a daily basis.

How many operators does momondo search for flights from Washington, D.C. to Islip Long Island Airport?

As of March 2026, there is 1 operator available to choose from for flights from Washington, D.C. to Islip Long Island Airport.

How old do you have to be to fly from Washington, D.C. to Islip Long Island Airport?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington, D.C. to Islip Long Island Airport.

What documentation or ID do you need to fly to Islip Long Island Airport?

The travel and health documents you'll need for your trip to Islip Long Island Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Islip Long Island Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$81 Cheap Flights from Washington, D.C. to Islip in 2026

Q: What is the typical price of a round-trip flight between Washington, D.C. and Islip, New York?

Prices are currently low for flights on this route. Typical prices usually range from $320 to $339. The lowest price recently found on this route was $197.

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Find the cheapest flights from Washington, D.C. to New York

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:12 am - 9:13 am

IAD

ISP

25h 01m

1 stop

4:07 pm - 7:32 am

ISP

IAD

15h 25m

1 stop

$197Frontier

Sat, Apr 25 - Sun, Apr 26

5:42 pm - 11:13 am

BWI

ISP

17h 31m

1 stop

7:34 pm - 12:44 am

ISP

BWI

29h 10m

2 stops

$207Frontier

Sat, Apr 4 - Mon, Apr 13

5:42 pm - 11:13 am

BWI

ISP

17h 31m

1 stop

7:34 pm - 4:40 pm

ISP

BWI

21h 06m

1 stop

$211Frontier

Sat, Apr 4 - Mon, Apr 13

9:18 am - 7:04 pm

BWI

ISP

9h 46m

1 stop

7:34 pm - 4:40 pm

ISP

BWI

21h 06m

1 stop

$214Frontier

Sun, Apr 5 - Mon, Apr 13

3:29 pm - 9:08 am

BWI

ISP

17h 39m

1 stop

10:03 am - 8:23 am

ISP

BWI

22h 20m

1 stop

$219Frontier

Wed, Jun 3 - Sat, Jun 13

3:29 pm - 9:08 am

BWI

ISP

17h 39m

1 stop

5:27 pm - 8:47 pm

ISP

BWI

27h 20m

2 stops

$222Multiple Airlines

Wed, Jun 3 - Tue, Jun 9

3:29 pm - 9:08 am

BWI

ISP

17h 39m

1 stop

11:57 am - 8:23 am

ISP

BWI

20h 26m

2 stops

$232Multiple Airlines

Wed, Jun 3 - Wed, Jun 10

6:00 am - 12:05 pm

DCA

ISP

6h 05m

1 stop

5:30 am - 11:20 am

ISP

DCA

5h 50m

1 stop

$299Southwest

Thu, May 14 - Sat, May 16

4:25 pm - 10:30 pm

DCA

ISP

6h 05m

1 stop

5:10 pm - 10:50 pm

ISP

DCA

5h 40m

1 stop

$327Southwest

Mon, Apr 27 - Fri, May 1

6:00 am - 11:35 am

DCA

ISP

5h 35m

1 stop

12:25 pm - 7:30 pm

ISP

DCA

7h 05m

1 stop

$571JetBlue

Thu, Jul 23 - Sun, Jul 26

Frontier flights from Washington, D.C. to Islip, New York

Our best Frontier deals on Washington, D.C. to Islip, New York flight tickets

Frontier

Apr 25

IAD8:12 amWashington, D.C. Dulles Intl

25h 01m

1 stop

ISP9:13 amIslip Long Island

Apr 26

ISP4:07 pmIslip Long Island

15h 25m

1 stop

IAD7:32 amWashington, D.C. Dulles Intl

$197

Frontier

Apr 4

BWI5:42 pmBaltimore/Washington

17h 31m

1 stop

ISP11:13 amIslip Long Island

Apr 13

ISP7:34 pmIslip Long Island

29h 10m

2 stops

BWI12:44 amBaltimore/Washington

$207

Frontier

Apr 4

BWI5:42 pmBaltimore/Washington

17h 31m

1 stop

ISP11:13 amIslip Long Island

Apr 13

ISP7:34 pmIslip Long Island

21h 06m

1 stop

BWI4:40 pmBaltimore/Washington

$211

Southwest flights from Washington, D.C. to Islip, New York

Our best Southwest deals on Washington, D.C. to Islip, New York flight tickets

Southwest

Apr 7

BWI10:45 amBaltimore/Washington

1h 10m

ISP11:55 amIslip Long Island

Apr 15

ISP12:30 pmIslip Long Island

1h 15m

BWI1:45 pmBaltimore/Washington

$281

Southwest

Mar 26

BWI10:30 amBaltimore/Washington

1h 10m

ISP11:40 amIslip Long Island

Mar 27

ISP6:00 amIslip Long Island

1h 20m

BWI7:20 amBaltimore/Washington

$286

Southwest

May 14

DCA6:00 amWashington, D.C. Reagan-National

6h 05m

1 stop

ISP12:05 pmIslip Long Island

May 16

ISP5:30 amIslip Long Island

5h 50m

1 stop

DCA11:20 amWashington, D.C. Reagan-National

$299

momondo Fare Finder

Use the filters below to find and compare flights from Washington, D.C. to Islip, New York that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Sat 4/25

8:12 am-9:13 am

1 stop25h 01m

Islip Long Island

Sun 4/26

4:07 pm-7:32 am

1 stop15h 25m

$197

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

Sat 4/4

5:42 pm-11:13 am

1 stop17h 31m

Islip Long Island

Mon 4/13

7:34 pm-12:44 am

2 stops29h 10m

$207

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

Sat 4/4

5:42 pm-11:13 am

1 stop17h 31m

Islip Long Island

Mon 4/13

7:34 pm-4:40 pm

1 stop21h 06m

$211

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

Sun 4/5

9:18 am-7:04 pm

1 stop9h 46m

Islip Long Island

Mon 4/13

7:34 pm-4:40 pm

1 stop21h 06m

$214

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

Wed 6/3

3:29 pm-9:08 am

1 stop17h 39m

Islip Long Island

Sat 6/13

10:03 am-8:23 am

1 stop22h 20m

$219

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

Wed 6/3

3:29 pm-9:08 am

1 stop17h 39m

Islip Long Island

Tue 6/9

5:27 pm-8:47 pm

2 stops27h 20m

$222

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

Wed 6/3

3:29 pm-9:08 am

1 stop17h 39m

Islip Long Island

Wed 6/10

11:57 am-8:23 am

2 stops20h 26m

$232

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Thu 5/14

6:00 am-12:05 pm

1 stop6h 05m

Islip Long Island

Sat 5/16

5:30 am-11:20 am

1 stop5h 50m

$299

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Mon 4/27

4:25 pm-10:30 pm

1 stop6h 05m

Islip Long Island

Fri 5/1

5:10 pm-10:50 pm

1 stop5h 40m

$327

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Thu 7/23

6:00 am-11:35 am

1 stop5h 35m

Islip Long Island

Sun 7/26

12:25 pm-7:30 pm

1 stop7h 05m

$571

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Washington, D.C. to Islip, New York

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the typical price of a round-trip flight between Washington, D.C. and Islip, New York?

What is the cheapest month to fly to Islip, New York?

The month of April is, on average, the cheapest month to fly to Islip, New York from Washington, D.C., with most prices found around $271. If you aren’t able to travel to Islip, New York during the month of April, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $275.

What is the cheapest Washington, D.C. to Islip Long Island flight route?

Fly from Baltimore/Washington to Islip Long Island for the best Washington, D.C. - Islip Long Island flight prices

What cabin class options are available on Washington, D.C. to Islip Long Island flights?

There is only 1 cabin class available to choose from on Washington, D.C. to Islip Long Island flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Washington, D.C. to Islip, New York flights?

You could potentially save up to 5% on your flight if you consider stops on a Washington, D.C. to Islip, New York flight.

When to book flights from Washington, D.C. to Islip, New York

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. to Islip, New York according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Washington, D.C. to Islip, New York (WAS to ISP) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. to Islip, New York

Best Price Found	$271
Fastest flight time	1h 10m
Direct flights	Mon, Tue, Wed, Fri, Sat and Sun
Airports in Islip, New York	1 airport

The best one-way flight to Islip, New York from Washington, D.C. in the past 72 hours is $271. The best round-trip flight deal from Washington, D.C. to Islip, New York found on momondo in the last 72 hours is $339.

The fastest flight from Washington, D.C. to Islip, New York takes 1h 10m

Direct flights go from Washington, D.C. to Islip, New York on Monday, Tuesday, Wednesday, Friday, Saturday and Sunday. The only airline offering direct flights is Southwest.

There is 1 airport in Islip, New York. From Washington, D.C. there are direct flights to Islip Long Island (ISP).

Search flight deals

How far is Washington, D.C. to Islip Long Island by plane?
The straight-line distance from Washington, D.C. to Islip Long Island is 238.7 mi. Flights usually cover this in 1h 10m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Washington, D.C. to Islip Long Island Airport?
Prices for flights from Washington, D.C. to Islip Long Island Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Washington, D.C. to Islip Long Island Airport?
As of March 2026, there is 1 operator available to choose from for flights from Washington, D.C. to Islip Long Island Airport.
How old do you have to be to fly from Washington, D.C. to Islip Long Island Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington, D.C. to Islip Long Island Airport.
What documentation or ID do you need to fly to Islip Long Island Airport?
The travel and health documents you'll need for your trip to Islip Long Island Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Islip Long Island Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Washington, D.C. to Islip, New York?
Based on momondo bookings for flights between Washington, D.C. and Islip, New York, the leading plane model is Boeing 737-800 Passenger/BBJ2 (winglets), making up 17.65% of the total bookings. Other popular models include Boeing 737 MAX 8 with 14.12%, Embraer 175 (Enhanced Winglets) with 9.41%, and Airbus A220-300 with 7.06%.
What is the most popular airline from Washington, D.C. to Islip, New York?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Washington, D.C. to Islip, New York is Southwest (100% of total bookings).

Best airlines flying from Washington, D.C. to Islip, New York

Compare and see reviews for airlines that fly from Washington, D.C. to Islip, New York with momondo

Airline	Rating	Free Cancellation	Price
Southwest	PriceFrom $231	Free Cancellation	Rating 8.0 4,306 reviews		Search Southwest flights

Montauk

Riverhead

Sag Harbor

Southampton

Amagansett

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to Islip?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Washington, D.C. to Islip. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Washington, D.C. to Islip with flexible booking policies on momondo?

momondo does allow users to show only those flights to Islip from Washington, D.C. which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Washington, D.C. to Islip?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Islip from Washington, D.C..

I’m not ready to book a flight from Washington, D.C. to Islip right now. Can momondo alert me if prices change?

Price alerts on flights to Islip from Washington, D.C. are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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Cheap flights from Washington, D.C. to New York from $81

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. to New York departing on 5/27. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Frontier flights from Washington, D.C. to Islip, New York

Our best Frontier deals on Washington, D.C. to Islip, New York flight tickets

Southwest flights from Washington, D.C. to Islip, New York

Our best Southwest deals on Washington, D.C. to Islip, New York flight tickets

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How to get the cheapest flight ticket from Washington, D.C. to Islip, New York

What is the typical price of a round-trip flight between Washington, D.C. and Islip, New York?

What is the cheapest month to fly to Islip, New York?

What is the cheapest Washington, D.C. to Islip Long Island flight route?

What cabin class options are available on Washington, D.C. to Islip Long Island flights?

Can stopping save me money on Washington, D.C. to Islip, New York flights?

What is the cheapest airline that flies from Washington, D.C. to Islip Long Island?

What airlines fly to Islip, New York?

How many flights depart from Washington, D.C. to Islip, New York on average per week?

How long does it take to fly to Islip, New York?

When to book flights from Washington, D.C. to Islip, New York

Cheap Washington, D.C. to Islip, New York (WAS to ISP) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. to Islip, New York

Best Price Found

Fastest flight time

Direct flights

Airports in Islip, New York

Best airlines flying from Washington, D.C. to Islip, New York

Compare and see reviews for airlines that fly from Washington, D.C. to Islip, New York with momondo

Traveling to a place near New York?

Why use momondo?

An easier way to manage your Islip, New York trip

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