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

As of September 2025, 15 flights take off from Washington, D.C. and land in Islip each week. The most common flight departure day for this route is Mon, with 20% of weekly flights taking off on this day.

What airlines fly to Islip?

United Airlines, Delta and American Airlines are the top three most popular airlines that fly to Islip from Washington, D.C. according to our data. United Airlines is the first choice among our users, with 33% of people opting to fly with this airline when traveling to Islip. Keep in mind that there are 6 different airlines that fly to Islip on a routine basis, so you have a few additional options to choose from.

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

2 flights are operational daily from Washington, D.C. to Islip as of September 2025. The most popular departure time for this route is 10:00AM, with 40% of flights per day taking off in the evening.

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

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

How long does it take to fly to Islip?

The flight from Washington, D.C. to Islip 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), then the flight time is 1h 15m 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 30m.

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 September 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.

$83 Cheap Flights from Washington, D.C. to Islip in 2025/26

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

Prices are currently low for flights on this route. Typical prices usually range from $420 to $563. The lowest price recently found on this route was $165.

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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

8:21 am - 4:27 pmBWI-ISP

8h 06m1 stop

9:49 am - 8:05 pmISP-BWI

10h 16m1 stop

$165Frontier

Find Deal

Fri, Oct 3 - Sun, Oct 5

4:20 pm - 10:37 amBWI-ISP

18h 17m2 stops

9:27 pm - 8:34 amISP-BWI

11h 07m1 stop

$191Frontier

Find Deal

Fri, Oct 31 - Sun, Nov 2

4:29 pm - 2:13 pmIAD-ISP

21h 44m1 stop

9:37 pm - 7:46 pmISP-IAD

22h 09m2 stops

$206Frontier

Find Deal

Mon, Oct 6 - Tue, Oct 7

8:00 am - 10:57 amBWI-ISP

26h 57m1 stop

9:37 pm - 12:40 pmISP-BWI

15h 03m1 stop

$214Multiple Airlines

Find Deal

Tue, Oct 14 - Tue, Oct 21

4:20 pm - 10:37 amBWI-ISP

18h 17m2 stops

9:27 pm - 3:30 pmISP-BWI

18h 03m2 stops

$224Frontier

Find Deal

Fri, Oct 31 - Sun, Nov 2

9:27 pm - 10:40 amBWI-ISP

13h 13m1 stop

11:40 am - 7:29 amISP-BWI

19h 49m2 stops

$232Multiple Airlines

Find Deal

Sun, Sep 28 - Sun, Oct 5

3:00 pm - 4:05 pmBWI-ISP

1h 05mnonstop

6:00 am - 7:15 amISP-BWI

1h 15mnonstop

$237Southwest

Find Deal

Tue, Oct 7 - Wed, Oct 8

10:35 pm - 11:45 pmBWI-ISP

1h 10mnonstop

4:55 pm - 6:10 pmISP-BWI

1h 15mnonstop

$246Southwest

Find Deal

Thu, Oct 9 - Tue, Oct 14

9:45 am - 4:08 pmDCA-ISP

6h 23m1 stop

11:35 am - 6:37 pmISP-DCA

7h 02m1 stop

$328JetBlue

Find Deal

Thu, Oct 2 - Mon, Oct 6

6:15 am - 3:23 pmDCA-ISP

9h 08m2 stops

11:35 am - 6:37 pmISP-DCA

7h 02m1 stop

$393JetBlue

Find Deal

Sat, Oct 4 - Mon, Oct 6

Frontier flights from Washington, D.C. to Islip

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

Frontier

Oct 3

BWI8:21 amBaltimore/Washington

8h 06m

1 stop

ISP4:27 pmIslip Long Island

Oct 5

ISP9:49 amIslip Long Island

10h 16m

1 stop

BWI8:05 pmBaltimore/Washington

$165

Find similar

Frontier

Oct 31

BWI4:20 pmBaltimore/Washington

18h 17m

2 stops

ISP10:37 amIslip Long Island

Nov 2

ISP9:27 pmIslip Long Island

11h 07m

1 stop

BWI8:34 amBaltimore/Washington

$191

Find similar

Frontier

Sep 18

IAD8:59 pmWashington, D.C. Dulles Intl

12h 05m

1 stop

ISP9:04 amIslip Long Island

Sep 25

ISP11:40 amIslip Long Island

6h 44m

1 stop

IAD6:24 pmWashington, D.C. Dulles Intl

$203

Find similar

Southwest flights from Washington, D.C. to Islip

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

Southwest

Oct 7

BWI3:00 pmBaltimore/Washington

1h 05m

ISP4:05 pmIslip Long Island

Oct 8

ISP6:00 amIslip Long Island

1h 15m

BWI7:15 amBaltimore/Washington

$237

Find similar

Southwest

Oct 9

BWI10:35 pmBaltimore/Washington

1h 10m

ISP11:45 pmIslip Long Island

Oct 14

ISP4:55 pmIslip Long Island

1h 15m

BWI6:10 pmBaltimore/Washington

$246

Find similar

Southwest

Oct 11

BWI8:25 pmBaltimore/Washington

1h 10m

ISP9:35 pmIslip Long Island

Oct 13

ISP5:30 amIslip Long Island

1h 15m

BWI6:45 amBaltimore/Washington

$255

Find similar

Fly from

Fly to

Route

Depart

Return

Price

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

Fri 10/3

8:21 am-4:27 pm

1 stop8h 06m

Islip Long Island

Sun 10/5

9:49 am-8:05 pm

1 stop10h 16m

$165

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

Fri 10/31

4:20 pm-10:37 am

2 stops18h 17m

Islip Long Island

Sun 11/2

9:27 pm-8:34 am

1 stop11h 07m

$191

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Mon 10/6

4:29 pm-2:13 pm

1 stop21h 44m

Islip Long Island

Tue 10/7

9:37 pm-7:46 pm

2 stops22h 09m

$206

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

Tue 10/14

8:00 am-10:57 am

1 stop26h 57m

Islip Long Island

Tue 10/21

9:37 pm-12:40 pm

1 stop15h 03m

$214

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

Fri 10/31

4:20 pm-10:37 am

2 stops18h 17m

Islip Long Island

Sun 11/2

9:27 pm-3:30 pm

2 stops18h 03m

$224

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

Sun 9/28

9:27 pm-10:40 am

1 stop13h 13m

Islip Long Island

Sun 10/5

11:40 am-7:29 am

2 stops19h 49m

$232

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

Tue 10/7

3:00 pm-4:05 pm

Nonstop1h 05m

Islip Long Island

Wed 10/8

6:00 am-7:15 am

Nonstop1h 15m

$237

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

Thu 10/9

10:35 pm-11:45 pm

Nonstop1h 10m

Islip Long Island

Tue 10/14

4:55 pm-6:10 pm

Nonstop1h 15m

$246

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Thu 10/2

9:45 am-4:08 pm

1 stop6h 23m

Islip Long Island

Mon 10/6

11:35 am-6:37 pm

1 stop7h 02m

$328

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Sat 10/4

6:15 am-3:23 pm

2 stops9h 08m

Islip Long Island

Mon 10/6

11:35 am-6:37 pm

1 stop7h 02m

$393

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

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?

What is the cheapest month to fly to Islip?

In general, April is the cheapest month to fly from Washington, D.C. to Islip. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $285. If you’re not able to fly to Islip in April, then March is your next best option. Flight prices from Washington, D.C. to Islip during March average around $320.

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

On average, the least expensive day to fly to Islip from Washington, D.C. is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $296. However, this price may fluctuate depending on the airline, the season, and holidays. Flights from Washington, D.C. to Islip on a Sunday will generally be more expensive and average around $487. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

Flying to Islip 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 in the morning are often more expensive with an average ticket price of $377.

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 flights?

You could potentially save up to 27% on your flight if you consider stops on a Washington, D.C. to Islip flight.

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

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. to Islip 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 (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

Best Price Found	$306
Fastest flight time	1h 05m
Direct flights	Every day
Airports in Islip	1 airport

The best one-way flight to Islip from Washington, D.C. in the past 72 hours is $306. The best round-trip flight deal from Washington, D.C. to Islip found on momondo in the last 72 hours is $304.

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

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

There is 1 airport near Islip: 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 05m, 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 September 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?
Based on momondo bookings for flights between Washington, D.C. and Islip, the leading plane model is Boeing 737-800 Passenger/BBJ2 (winglets), making up 22.56% of the total bookings. Other popular models include Boeing 737-700 Passenger/BBJ1 (winglets) with 15.85%, Boeing 737 MAX 8 with 11.59%, and Airbus A220-300 with 9.15%.
What is the most popular airline from Washington, D.C. to Islip?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Washington, D.C. to Islip is Southwest (100% of total bookings).

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

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

Airline	Rating	Free Cancellation	Price
Southwest	PriceFrom $233	Free Cancellation	Rating 8.0 4,242 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 $83

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 10/24. 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

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

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

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 typical price of a round-trip flight between Washington, D.C. and Islip?

What is the cheapest month to fly to Islip?

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

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

Flying to Islip 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 in the morning are often more expensive with an average ticket price of $377.

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 flights?

You could potentially save up to 27% on your flight if you consider stops on a Washington, D.C. to Islip flight.

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

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

What airlines fly to Islip?

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

2 flights are operational daily from Washington, D.C. to Islip as of September 2025. The most popular departure time for this route is 10:00AM, with 40% of flights per day taking off in the evening.

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

As of September 2025, 15 flights take off from Washington, D.C. and land in Islip each week. The most common flight departure day for this route is Mon, with 20% of weekly flights taking off on this day.

How long does it take to fly to Islip?

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

Cheap Washington, D.C. to Islip (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

Best Price Found

Fastest flight time

Direct flights

Airports in Islip

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?

What is the most popular airline from Washington, D.C. to Islip?

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

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