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

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

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

As of March 2026, 15 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 20% of weekly flights taking off on this day.

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 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 4h 18m.

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

2 flights are operational daily from Washington, D.C. to Islip, New York as of March 2026. The most popular departure time for this route is 10:00AM, with 36% of flights per day taking off at noon.

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 40% 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.

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.

$104 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 $300 to $316. The lowest price recently found on this route was $250.

1 adult

0 bags

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

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.

8:47 am - 7:04 pm

IAD

ISP

10h 17m

1 stop

5:30 am - 3:12 pm

ISP

IAD

9h 42m

1 stop

$250Frontier

Sun, Apr 5 - Thu, Apr 9

10:45 am - 11:55 am

BWI

ISP

1h 10mnonstop

4:10 pm - 5:30 pm

ISP

BWI

1h 20mnonstop

$263Southwest

Tue, Apr 21 - Tue, Apr 21

1:38 pm - 10:03 am

IAD

ISP

20h 25m

1 stop

10:48 am - 12:53 pm

ISP

IAD

26h 05m

1 stop

$270Frontier

Fri, Jul 10 - Sun, Jul 12

7:10 pm - 8:25 pm

BWI

ISP

1h 15mnonstop

6:30 am - 7:50 am

ISP

BWI

1h 20mnonstop

$294Southwest

Fri, May 22 - Tue, May 26

3:35 pm - 4:45 pm

BWI

ISP

1h 10mnonstop

9:00 am - 10:20 am

ISP

BWI

1h 20mnonstop

$311Southwest

Sun, May 31 - Tue, Jun 2

9:59 pm - 10:03 am

BWI

ISP

12h 04m

1 stop

10:48 am - 9:04 pm

ISP

BWI

10h 16m

1 stop

$313Frontier

Thu, Jul 30 - Thu, Aug 6

8:30 pm - 7:04 pm

IAD

ISP

22h 34m

1 stop

2:54 pm - 12:36 am

ISP

IAD

33h 42m

2 stops

$315Frontier

Sat, Apr 4 - Wed, Apr 8

10:05 pm - 11:20 pm

BWI

ISP

1h 15mnonstop

6:05 am - 7:25 am

ISP

BWI

1h 20mnonstop

$319Southwest

Sat, May 16 - Sun, May 17

9:59 pm - 10:03 am

BWI

ISP

12h 04m

1 stop

11:57 am - 9:06 am

ISP

BWI

21h 09m

2 stops

$325Multiple Airlines

Thu, Jul 30 - Wed, Aug 5

8:34 am - 12:23 am

IAD

ISP

15h 49m

1 stop

6:40 pm - 5:31 pm

ISP

IAD

22h 51m

1 stop

$325Frontier

Fri, Apr 3 - Mon, Apr 6

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 5

IAD8:47 amWashington, D.C. Dulles Intl

10h 17m

1 stop

ISP7:04 pmIslip Long Island

Apr 9

ISP5:30 amIslip Long Island

9h 42m

1 stop

IAD3:12 pmWashington, D.C. Dulles Intl

$250

Frontier

Jul 10

IAD1:38 pmWashington, D.C. Dulles Intl

20h 25m

1 stop

ISP10:03 amIslip Long Island

Jul 12

ISP10:48 amIslip Long Island

26h 05m

1 stop

IAD12:53 pmWashington, D.C. Dulles Intl

$270

Frontier

Jul 30

BWI9:59 pmBaltimore/Washington

12h 04m

1 stop

ISP10:03 amIslip Long Island

Aug 6

ISP10:48 amIslip Long Island

10h 16m

1 stop

BWI9:04 pmBaltimore/Washington

$313

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 21

BWI10:45 amBaltimore/Washington

1h 10m

ISP11:55 amIslip Long Island

Apr 21

ISP4:10 pmIslip Long Island

1h 20m

BWI5:30 pmBaltimore/Washington

$263

Southwest

Apr 20

BWI10:20 pmBaltimore/Washington

1h 10m

ISP11:30 pmIslip Long Island

Apr 22

ISP6:30 amIslip Long Island

1h 20m

BWI7:50 amBaltimore/Washington

$268

Southwest

May 22

BWI7:10 pmBaltimore/Washington

1h 15m

ISP8:25 pmIslip Long Island

May 26

ISP6:30 amIslip Long Island

1h 20m

BWI7:50 amBaltimore/Washington

$294

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

Sun 4/5

8:47 am-7:04 pm

1 stop10h 17m

Islip Long Island

Thu 4/9

5:30 am-3:12 pm

1 stop9h 42m

$250

Quickest round-trip

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

Tue 4/21

10:45 am-11:55 am

Nonstop1h 10m

Islip Long Island

Tue 4/21

4:10 pm-5:30 pm

Nonstop1h 20m

$263

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Fri 7/10

1:38 pm-10:03 am

1 stop20h 25m

Islip Long Island

Sun 7/12

10:48 am-12:53 pm

1 stop26h 05m

$270

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

Fri 5/22

7:10 pm-8:25 pm

Nonstop1h 15m

Islip Long Island

Tue 5/26

6:30 am-7:50 am

Nonstop1h 20m

$294

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

Sun 5/31

3:35 pm-4:45 pm

Nonstop1h 10m

Islip Long Island

Tue 6/2

9:00 am-10:20 am

Nonstop1h 20m

$311

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

Thu 7/30

9:59 pm-10:03 am

1 stop12h 04m

Islip Long Island

Thu 8/6

10:48 am-9:04 pm

1 stop10h 16m

$313

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Sat 4/4

8:30 pm-7:04 pm

1 stop22h 34m

Islip Long Island

Wed 4/8

2:54 pm-12:36 am

2 stops33h 42m

$315

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

Sat 5/16

10:05 pm-11:20 pm

Nonstop1h 15m

Islip Long Island

Sun 5/17

6:05 am-7:25 am

Nonstop1h 20m

$319

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

Thu 7/30

9:59 pm-10:03 am

1 stop12h 04m

Islip Long Island

Wed 8/5

11:57 am-9:06 am

2 stops21h 09m

$325

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Fri 4/3

8:34 am-12:23 am

1 stop15h 49m

Islip Long Island

Mon 4/6

6:40 pm-5:31 pm

1 stop22h 51m

$325

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 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	$269
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 $269. The best round-trip flight deal from Washington, D.C. to Islip, New York found on momondo in the last 72 hours is $332.

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

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 16.87% of the total bookings. Other popular models include Boeing 737 MAX 8 with 14.46%, Embraer 175 (Enhanced Winglets) with 9.64%, and Airbus A220-300 with 6.02%.
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 4,331 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.

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.

Start using Trips

Find my bookings

Get notified when prices go down

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

1 adult

Thu 4/23

Thu 4/30

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States

Nearby airports

Airlines

Cabin classes

Other United States destinations

Other flights from Washington, D.C.

Complete your trip

Feeling lucky

Cheap flights from Washington, D.C. to New York from $104

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 5/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

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

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Cheap direct flights

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

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.

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 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 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

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

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

Fly your favorite airline to New York

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to New York

List of cabin classes available on flights landing in New York. Availability may vary depending on flight origin and airline.

Popular cities in the United States

Popular flights according to clicks in the last 7 days on momondo

Fly to other destinations from Washington, D.C.

According to popular flight searches on momondo this year

Complete your trip to New York

Explore popular destinations other users love

According to popular flight searches on momondo this year