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

Southwest, Avelo Airlines, and Frontier 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 18m 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 5h 01m.

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 35% 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 November 2025, 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 Mon, with 29% 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 November 2025. The most popular departure time for this route is 11:00AM, with 37% 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 November 2025, 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.

$59 Cheap Flights from Washington, D.C. to Islip in 2025/26

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Cheap round-trip flights

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9:11 pm - 10:40 amBWI-ISP

13h 29m1 stop

11:35 am - 8:16 pmISP-BWI

8h 41m1 stop

$150Frontier

Find Deal

Thu, Jan 22 - Thu, Jan 29

5:20 pm - 10:40 amIAD-ISP

17h 20m2 stops

5:10 pm - 8:46 amISP-IAD

15h 36m1 stop

$172Frontier

Find Deal

Thu, Jan 22 - Sun, Jan 25

9:11 pm - 10:40 amBWI-ISP

13h 29m1 stop

11:55 am - 7:47 amISP-BWI

19h 52m2 stops

$181Multiple Airlines

Find Deal

Thu, Jan 22 - Thu, Jan 29

9:11 pm - 9:13 amBWI-ISP

12h 02m1 stop

11:40 am - 7:42 amISP-BWI

20h 02m2 stops

$200Multiple Airlines

Find Deal

Fri, Dec 12 - Sun, Dec 14

9:11 pm - 9:13 amBWI-ISP

12h 02m1 stop

11:15 am - 12:23 amISP-BWI

13h 08m1 stop

$206Multiple Airlines

Find Deal

Fri, Dec 12 - Sun, Dec 14

8:55 pm - 10:05 pmBWI-ISP

1h 10mnonstop

5:40 am - 7:00 amISP-BWI

1h 20mnonstop

$228Southwest

Find Deal

Thu, Dec 11 - Tue, Dec 16

9:11 pm - 8:07 pmBWI-ISP

22h 56m2 stops

8:29 pm - 9:22 amISP-BWI

12h 53m1 stop

$237Multiple Airlines

Find Deal

Thu, Dec 11 - Tue, Dec 16

11:50 am - 7:32 pmDCA-ISP

7h 42m1 stop

10:50 am - 5:21 pmISP-DCA

6h 31m1 stop

$243JetBlue

Find Deal

Wed, Nov 26 - Sun, Nov 30

10:45 pm - 11:55 pmBWI-ISP

1h 10mnonstop

6:00 am - 7:30 amISP-BWI

1h 30mnonstop

$275Southwest

Find Deal

Fri, Jan 2 - Thu, Jan 8

9:45 am - 8:55 amDCA-ISP

23h 10m1 stop

9:40 am - 6:00 pmISP-DCA

8h 20m1 stop

$371JetBlue

Find Deal

Thu, Jan 22 - Sun, Jan 25

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

Jan 22

BWI9:11 pmBaltimore/Washington

13h 29m

1 stop

ISP10:40 amIslip Long Island

Jan 29

ISP11:35 amIslip Long Island

8h 41m

1 stop

BWI8:16 pmBaltimore/Washington

$150

Find similar

Frontier

Jan 22

IAD5:20 pmWashington, D.C. Dulles Intl

17h 20m

2 stops

ISP10:40 amIslip Long Island

Jan 25

ISP5:10 pmIslip Long Island

15h 36m

1 stop

IAD8:46 amWashington, D.C. Dulles Intl

$172

Find similar

Frontier

Dec 12

IAD9:20 pmWashington, D.C. Dulles Intl

11h 53m

1 stop

ISP9:13 amIslip Long Island

Dec 14

ISP11:15 amIslip Long Island

9h 09m

1 stop

IAD8:24 pmWashington, D.C. Dulles Intl

$310

Find similar

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

Dec 11

BWI8:55 pmBaltimore/Washington

1h 10m

ISP10:05 pmIslip Long Island

Dec 16

ISP5:40 amIslip Long Island

1h 20m

BWI7:00 amBaltimore/Washington

$228

Find similar

Southwest

Jan 2

BWI10:45 pmBaltimore/Washington

1h 10m

ISP11:55 pmIslip Long Island

Jan 8

ISP6:00 amIslip Long Island

1h 30m

BWI7:30 amBaltimore/Washington

$275

Find similar

Southwest

Jan 22

BWI8:45 pmBaltimore/Washington

1h 10m

ISP9:55 pmIslip Long Island

Jan 29

ISP3:45 pmIslip Long Island

1h 20m

BWI5:05 pmBaltimore/Washington

$339

Find similar

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

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

Thu 1/22

9:11 pm-10:40 am

1 stop13h 29m

Islip Long Island

Thu 1/29

11:35 am-8:16 pm

1 stop8h 41m

$150

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Thu 1/22

5:20 pm-10:40 am

2 stops17h 20m

Islip Long Island

Sun 1/25

5:10 pm-8:46 am

1 stop15h 36m

$172

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

Thu 1/22

9:11 pm-10:40 am

1 stop13h 29m

Islip Long Island

Thu 1/29

11:55 am-7:47 am

2 stops19h 52m

$181

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

Fri 12/12

9:11 pm-9:13 am

1 stop12h 02m

Islip Long Island

Sun 12/14

11:40 am-7:42 am

2 stops20h 02m

$200

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

Fri 12/12

9:11 pm-9:13 am

1 stop12h 02m

Islip Long Island

Sun 12/14

11:15 am-12:23 am

1 stop13h 08m

$206

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

Thu 12/11

8:55 pm-10:05 pm

Nonstop1h 10m

Islip Long Island

Tue 12/16

5:40 am-7:00 am

Nonstop1h 20m

$228

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

Thu 12/11

9:11 pm-8:07 pm

2 stops22h 56m

Islip Long Island

Tue 12/16

8:29 pm-9:22 am

1 stop12h 53m

$237

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Wed 11/26

11:50 am-7:32 pm

1 stop7h 42m

Islip Long Island

Sun 11/30

10:50 am-5:21 pm

1 stop6h 31m

$243

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

Fri 1/2

10:45 pm-11:55 pm

Nonstop1h 10m

Islip Long Island

Thu 1/8

6:00 am-7:30 am

Nonstop1h 30m

$275

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Thu 1/22

9:45 am-8:55 am

1 stop23h 10m

Islip Long Island

Sun 1/25

9:40 am-6:00 pm

1 stop8h 20m

$371

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 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 $285. If you aren’t able to travel to Islip, New York during the month of April, then flying in March is also cheap. Prices for this month can be found on momondo for an average of $320.

What is the cheapest day to depart on your flight to Islip, New York?

The cheapest day to depart from Washington, D.C. to Islip, New York is on a Tuesday. Travelers who choose to depart for Islip, New York on a Tuesday will often find tickets for as low as $296. The most expensive day to fly to Islip, New York is Sunday, with ticket prices averaging around $487.

What is the cheapest time of day to depart on your flight to Islip, New York?

Flying to Islip, New York from Washington, D.C. in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $337 when looking at flights departing in the afternoon. Flights to Islip, New York are more costly in the morning, with an average ticket price of $377. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

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 34% 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	$470
Fastest flight time	1h 05m
Direct flights	Every day
Airports in Islip, New York	1 airport

The best flight deal from Washington, D.C. to Islip, New York found on momondo in the last 72 hours is $470

The fastest flight from Washington, D.C. to Islip, New York takes 1h 05m

Direct flights go from Washington, D.C. to Islip, New York every day.

There is 1 airport near Islip, New York: 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 November 2025, 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 22.30% of the total bookings. Other popular models include Boeing 737-700 Passenger/BBJ1 (winglets) with 14.19%, Embraer 175 with 9.46%, and Boeing 737 MAX 8 with 8.11%.
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 4,235 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 $55

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 1/10. 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

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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.

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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

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

What is the cheapest day to depart on your flight to Islip, New York?

The cheapest day to depart from Washington, D.C. to Islip, New York is on a Tuesday. Travelers who choose to depart for Islip, New York on a Tuesday will often find tickets for as low as $296. The most expensive day to fly to Islip, New York is Sunday, with ticket prices averaging around $487.

What is the cheapest time of day to depart on your flight to Islip, New York?

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 34% on your flight if you consider stops on a Washington, D.C. to Islip, New York flight.

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

Southwest, Avelo Airlines, and Frontier are the most popular carriers operating 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?

3 flights are operational daily from Washington, D.C. to Islip, New York as of November 2025. The most popular departure time for this route is 11:00AM, with 37% of flights per day taking off in the afternoon.

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

As of November 2025, 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 Mon, with 29% of weekly flights taking off on this day.

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

How far is Washington, D.C. to Islip Long Island by plane?

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

How many operators does momondo search 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?

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

What is the most popular plane model from Washington, D.C. to Islip, New York?

What is the most popular airline 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?

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

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

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

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

An easier way to manage your Islip, New York trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

Airports servicing New York