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

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

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 48% 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 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 16m 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 14m.

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

As of July 2026, 21 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 Thu, with 24% of weekly flights taking off on this day.

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

3 flights are operational daily from Washington, D.C. to Islip, New York as of July 2026. The most popular departure time for this route is 10:00PM, with 40% of flights per day taking off in the afternoon.

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 July 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.

$114 Cheap Flights from Washington, D.C. to Islip, New York 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 $417 to $471. The lowest price recently found on this route was $220.

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.

12:28 pm - 7:01 pm

IAD

ISP

6h 33m

1 stop

10:57 am - 12:47 pm

ISP

IAD

25h 50m

1 stop

$220Frontier

Wed, Jul 29 - Wed, Aug 5

11:05 am - 9:53 am

IAD

ISP

22h 48m

1 stop

10:57 am - 10:07 am

ISP

IAD

23h 10m

1 stop

$228Frontier

Wed, Aug 19 - Tue, Aug 25

1:40 pm - 2:50 pm

BWI

ISP

1h 10mnonstop

12:15 pm - 1:30 pm

ISP

BWI

1h 15mnonstop

$241Southwest

Sat, Jul 25 - Sat, Aug 1

12:28 pm - 7:01 pm

IAD

ISP

6h 33m

1 stop

10:57 am - 10:07 am

ISP

IAD

23h 10m

1 stop

$241Frontier

Sun, Aug 23 - Tue, Aug 25

11:05 am - 9:53 am

IAD

ISP

22h 48m

1 stop

5:27 pm - 1:20 pm

ISP

IAD

43h 53m

2 stops

$246Multiple Airlines

Tue, Aug 18 - Tue, Aug 25

11:05 am - 9:53 am

IAD

ISP

22h 48m

1 stop

7:09 pm - 4:07 pm

ISP

IAD

20h 58m

1 stop

$247Frontier

Wed, Aug 26 - Fri, Aug 28

8:25 am - 9:40 am

BWI

ISP

1h 15mnonstop

11:55 am - 1:15 pm

ISP

BWI

1h 20mnonstop

$251Southwest

Thu, Aug 6 - Sat, Aug 8

6:24 am - 9:33 am

BWI

ISP

27h 09m

1 stop

12:00 pm - 8:29 am

ISP

BWI

20h 29m

2 stops

$252Multiple Airlines

Tue, Sep 8 - Tue, Sep 15

3:10 pm - 9:44 pm

DCA

ISP

6h 34m

1 stop

6:00 am - 2:15 pm

ISP

DCA

8h 15m

1 stop

$373JetBlue

Tue, Jul 28 - Thu, Jul 30

3:10 pm - 9:44 pm

DCA

ISP

6h 34m

1 stop

6:00 am - 2:15 pm

ISP

DCA

8h 15m

1 stop

$374JetBlue

Tue, Jul 14 - Tue, Jul 21

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

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

JetBlue

Jul 28

DCA3:10 pmWashington, D.C. Reagan-National

6h 34m

1 stop

ISP9:44 pmIslip Long Island

Jul 30

ISP6:00 amIslip Long Island

8h 15m

1 stop

DCA2:15 pmWashington, D.C. Reagan-National

$373

JetBlue

Jul 14

DCA3:10 pmWashington, D.C. Reagan-National

6h 34m

1 stop

ISP9:44 pmIslip Long Island

Jul 21

ISP6:00 amIslip Long Island

8h 15m

1 stop

DCA2:15 pmWashington, D.C. Reagan-National

$374

JetBlue

Jul 21

DCA3:10 pmWashington, D.C. Reagan-National

6h 34m

1 stop

ISP9:44 pmIslip Long Island

Jul 22

ISP6:00 amIslip Long Island

8h 15m

1 stop

DCA2:15 pmWashington, D.C. Reagan-National

$393

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

Jul 25

BWI1:40 pmBaltimore/Washington

1h 10m

ISP2:50 pmIslip Long Island

Aug 1

ISP12:15 pmIslip Long Island

1h 15m

BWI1:30 pmBaltimore/Washington

$241

Southwest

Aug 6

BWI8:25 amBaltimore/Washington

1h 15m

ISP9:40 amIslip Long Island

Aug 8

ISP11:55 amIslip Long Island

1h 20m

BWI1:15 pmBaltimore/Washington

$251

Southwest

Sep 14

BWI3:15 pmBaltimore/Washington

1h 10m

ISP4:25 pmIslip Long Island

Sep 17

ISP12:35 pmIslip Long Island

1h 15m

BWI1:50 pmBaltimore/Washington

$261

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

Cheapest round-trip

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Wed 7/29

12:28 pm-7:01 pm

1 stop6h 33m

Islip Long Island

Wed 8/5

10:57 am-12:47 pm

1 stop25h 50m

$220

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Wed 8/19

11:05 am-9:53 am

1 stop22h 48m

Islip Long Island

Tue 8/25

10:57 am-10:07 am

1 stop23h 10m

$228

Quickest round-trip

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

Sat 7/25

1:40 pm-2:50 pm

Nonstop1h 10m

Islip Long Island

Sat 8/1

12:15 pm-1:30 pm

Nonstop1h 15m

$241

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Sun 8/23

12:28 pm-7:01 pm

1 stop6h 33m

Islip Long Island

Tue 8/25

10:57 am-10:07 am

1 stop23h 10m

$241

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Tue 8/18

11:05 am-9:53 am

1 stop22h 48m

Islip Long Island

Tue 8/25

5:27 pm-1:20 pm

2 stops43h 53m

$246

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Wed 8/26

11:05 am-9:53 am

1 stop22h 48m

Islip Long Island

Fri 8/28

7:09 pm-4:07 pm

1 stop20h 58m

$247

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

Thu 8/6

8:25 am-9:40 am

Nonstop1h 15m

Islip Long Island

Sat 8/8

11:55 am-1:15 pm

Nonstop1h 20m

$251

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

Tue 9/8

6:24 am-9:33 am

1 stop27h 09m

Islip Long Island

Tue 9/15

12:00 pm-8:29 am

2 stops20h 29m

$252

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Tue 7/28

3:10 pm-9:44 pm

1 stop6h 34m

Islip Long Island

Thu 7/30

6:00 am-2:15 pm

1 stop8h 15m

$373

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Tue 7/14

3:10 pm-9:44 pm

1 stop6h 34m

Islip Long Island

Tue 7/21

6:00 am-2:15 pm

1 stop8h 15m

$374

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 February is, on average, the cheapest month to fly to Islip, New York from Washington, D.C., with most prices found around $0. If you aren’t able to travel to Islip, New York during the month of February, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $157.

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, New York flights?

There is only 1 cabin class available to choose from on Washington, D.C. to Islip, New York 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 15% 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	$172
Fastest flight time	1h 10m
Direct flights	Every day
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 $172. The best round-trip flight deal from Washington, D.C. to Islip, New York found on momondo in the last 72 hours is $328.

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 every day.

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

Search flight deals

Frequently asked questions about flying from Washington, D.C. to Islip, New York

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 July 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 MAX 8, making up 33.74% of the total bookings. Other popular models include Boeing 737-800 Passenger/BBJ2 (winglets) with 14.72%, Airbus A220-300 with 9.20%, and Boeing 737 with 6.13%.
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 $244	Free Cancellation	Rating 7.9 4,249 reviews		Search Southwest flights

Montauk

Riverhead

Southampton

Sag Harbor

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 $114

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 8/4. 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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JetBlue flights from Washington, D.C. to Islip, New York

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

See travel insights to New York from

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, New York 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 day?

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

Frequently asked questions about flying from Washington, D.C. to 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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