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

As of April 2026, there are 9 flights per week flying from Islip, New York to Washington, D.C.. The most common day of the week flights depart is Thu, with 33% of flights taking off on this day.

What airlines fly to Washington, D.C.?

United Airlines, Delta and American Airlines are the top three most popular airlines that fly to Washington, D.C. from Islip, New York according to our data. United Airlines is the first choice among our users, with 41% of people opting to fly with this airline when traveling to Washington, D.C.. Keep in mind that there are 5 different airlines that fly to Washington, D.C. on a routine basis, so you have a few additional options to choose from.

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

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

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

The number of flights available between Islip, New York and Washington, D.C. is 1 per day as of April 2026. The most frequent departure time is 6:00AM, with 63% of daily flights leaving in the afternoon.

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

Prices for flights from Islip Long Island Airport to Washington, D.C. are updated daily.

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

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

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

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Islip Long Island Airport to Washington, D.C..

What documentation or ID do you need to fly to Washington, D.C.?

The required travel and health documents for your Washington, D.C. trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Washington, D.C.. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$95 Cheap Flights from Islip to Washington, D.C. in 2026

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

Prices are currently low for flights on this route. Typical prices usually range from $429 to $367. The lowest price recently found on this route was $176.

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

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

4:07 pm - 11:22 am

ISP

BWI

19h 15m

2 stops

9:38 am - 11:00 am

BWI

ISP

25h 22m

1 stop

$176Frontier

Mon, Apr 27 - Mon, May 4

8:31 pm - 1:41 pm

ISP

BWI

17h 10m

1 stop

5:45 pm - 11:00 am

BWI

ISP

17h 15m

1 stop

$197Frontier

Mon, Apr 27 - Mon, May 4

6:59 pm - 9:12 am

ISP

BWI

14h 13m

1 stop

9:49 pm - 10:05 am

BWI

ISP

12h 16m

1 stop

$249Frontier

Fri, May 8 - Sun, May 10

8:35 pm - 11:22 am

ISP

BWI

38h 47m

2 stops

3:26 pm - 10:05 am

BWI

ISP

18h 39m

1 stop

$251Multiple Airlines

Sun, Apr 26 - Tue, May 26

8:31 pm - 4:58 pm

ISP

BWI

20h 27m

2 stops

1:43 pm - 10:05 am

BWI

ISP

20h 22m

1 stop

$258Multiple Airlines

Fri, May 1 - Fri, May 8

9:01 pm - 7:43 am

ISP

BWI

34h 42m

2 stops

9:49 pm - 10:05 am

BWI

ISP

12h 16m

1 stop

$262Multiple Airlines

Sun, May 3 - Sun, May 10

6:00 am - 7:20 am

ISP

BWI

1h 20mnonstop

10:45 am - 11:55 am

BWI

ISP

1h 10mnonstop

$271Southwest

Mon, Apr 27 - Wed, Apr 29

8:35 am - 9:55 am

ISP

BWI

1h 20mnonstop

7:10 pm - 8:25 pm

BWI

ISP

1h 15mnonstop

$279Southwest

Thu, Apr 23 - Mon, Apr 27

9:18 pm - 9:02 am

ISP

DCA

11h 44m

1 stop

8:55 am - 4:29 pm

DCA

ISP

7h 34m

1 stop

$423JetBlue

Sat, Apr 18 - Wed, Apr 22

9:04 pm - 9:02 am

ISP

DCA

11h 58m

1 stop

6:10 pm - 4:29 pm

DCA

ISP

22h 19m

1 stop

$437JetBlue

Thu, Apr 23 - Mon, Apr 27

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

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

Frontier

Apr 27

ISP4:07 pmIslip Long Island

19h 15m

2 stops

BWI11:22 amBaltimore/Washington

May 4

BWI9:38 amBaltimore/Washington

25h 22m

1 stop

ISP11:00 amIslip Long Island

$176

Frontier

Apr 27

ISP8:31 pmIslip Long Island

17h 10m

1 stop

BWI1:41 pmBaltimore/Washington

May 4

BWI5:45 pmBaltimore/Washington

17h 15m

1 stop

ISP11:00 amIslip Long Island

$197

Frontier

May 8

ISP6:59 pmIslip Long Island

14h 13m

1 stop

BWI9:12 amBaltimore/Washington

May 10

BWI9:49 pmBaltimore/Washington

12h 16m

1 stop

ISP10:05 amIslip Long Island

$249

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

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

Southwest

Apr 27

ISP6:00 amIslip Long Island

1h 20m

BWI7:20 amBaltimore/Washington

Apr 29

BWI10:45 amBaltimore/Washington

1h 10m

ISP11:55 amIslip Long Island

$271

Southwest

Apr 23

ISP8:35 amIslip Long Island

1h 20m

BWI9:55 amBaltimore/Washington

Apr 27

BWI7:10 pmBaltimore/Washington

1h 15m

ISP8:25 pmIslip Long Island

$279

Southwest

Aug 18

ISP6:05 amIslip Long Island

1h 15m

BWI7:20 amBaltimore/Washington

Aug 21

BWI3:15 pmBaltimore/Washington

1h 10m

ISP4:25 pmIslip Long Island

$311

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

IslipBaltimore

ISP - BWI

ISPBWI

Islip Long Island

Mon 4/27

4:07 pm-11:22 am

2 stops19h 15m

Baltimore/Washington

Mon 5/4

9:38 am-11:00 am

1 stop25h 22m

$176

IslipBaltimore

ISP - BWI

ISPBWI

Islip Long Island

Mon 4/27

8:31 pm-1:41 pm

1 stop17h 10m

Baltimore/Washington

Mon 5/4

5:45 pm-11:00 am

1 stop17h 15m

$197

IslipBaltimore

ISP - BWI

ISPBWI

Islip Long Island

Fri 5/8

6:59 pm-9:12 am

1 stop14h 13m

Baltimore/Washington

Sun 5/10

9:49 pm-10:05 am

1 stop12h 16m

$249

IslipBaltimore

ISP - BWI

ISPBWI

Islip Long Island

Sun 4/26

8:35 pm-11:22 am

2 stops38h 47m

Baltimore/Washington

Tue 5/26

3:26 pm-10:05 am

1 stop18h 39m

$251

IslipBaltimore

ISP - BWI

ISPBWI

Islip Long Island

Fri 5/1

8:31 pm-4:58 pm

2 stops20h 27m

Baltimore/Washington

Fri 5/8

1:43 pm-10:05 am

1 stop20h 22m

$258

IslipBaltimore

ISP - BWI

ISPBWI

Islip Long Island

Sun 5/3

9:01 pm-7:43 am

2 stops34h 42m

Baltimore/Washington

Sun 5/10

9:49 pm-10:05 am

1 stop12h 16m

$262

Quickest round-trip

IslipBaltimore

ISP - BWI

ISPBWI

Islip Long Island

Mon 4/27

6:00 am-7:20 am

Nonstop1h 20m

Baltimore/Washington

Wed 4/29

10:45 am-11:55 am

Nonstop1h 10m

$271

IslipBaltimore

ISP - BWI

ISPBWI

Islip Long Island

Thu 4/23

8:35 am-9:55 am

Nonstop1h 20m

Baltimore/Washington

Mon 4/27

7:10 pm-8:25 pm

Nonstop1h 15m

$279

IslipWashington, D.C.

ISP - DCA

ISPDCA

Islip Long Island

Sat 4/18

9:18 pm-9:02 am

1 stop11h 44m

Washington, D.C. Reagan-National

Wed 4/22

8:55 am-4:29 pm

1 stop7h 34m

$423

IslipWashington, D.C.

ISP - DCA

ISPDCA

Islip Long Island

Thu 4/23

9:04 pm-9:02 am

1 stop11h 58m

Washington, D.C. Reagan-National

Mon 4/27

6:10 pm-4:29 pm

1 stop22h 19m

$437

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 Islip, New York to Washington, D.C.

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 Islip, New York and Washington, D.C.?

What is the cheapest day to depart on your flight to Washington, D.C.?

On average, the least expensive day to fly to Washington, D.C. from Islip, New York is on a Friday. momondo users have found tickets for Friday departures for as low as $337. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Islip, New York to Washington, D.C. for around $427.

What is the cheapest time of day to depart on your flight to Washington, D.C.?

In the morning is the cheapest time of day to fly from Islip, New York to Washington, D.C. when you can find flight prices for as low as $364. Flying to Washington, D.C. in the morning is an ideal time because this is during off-peak travel hours. Try not to purchase tickets in the evening because they tend to be around $432. Of course, these prices can vary depending on the time of year and what airport you fly to.

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

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

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

There is only 1 cabin class available to choose from on Islip Long Island to Washington, D.C. 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 Islip, New York to Washington, D.C. flights?

You could potentially save up to 39% on your flight if you consider stops on a Islip, New York to Washington, D.C. flight.

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

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

Estimated round-trip price

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

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

Best Price Found	$223
Fastest flight time	1h 15m
Direct flights	Mon, Tue, Wed, Thu, Fri and Sat
Airports in Washington, D.C.	2 airports

The best one-way flight to Washington, D.C. from Islip, New York in the past 72 hours is $223. The best round-trip flight deal from Islip, New York to Washington, D.C. found on momondo in the last 72 hours is $340.

The fastest flight from Islip, New York to Washington, D.C. takes 1h 15m

Direct flights go from Islip, New York to Washington, D.C. on Monday, Tuesday, Wednesday, Thursday, Friday and Saturday. There are no airlines offering direct flights.

There are 2 airports in Washington, D.C.. From Islip, New York there are direct flights to Baltimore/Washington (BWI).

Search flight deals

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

How far is Islip Long Island to Washington, D.C. by plane?
A flight from Islip Long Island to Washington, D.C. will travel around 238.7 mi. A reasonable flight in good conditions will take 1h 15m.
When did momondo last update prices for flights from Islip Long Island Airport to Washington, D.C.?
Prices for flights from Islip Long Island Airport to Washington, D.C. are updated daily.
How many operators does momondo search for flights from Islip Long Island Airport to Washington, D.C.?
As of April 2026, there is 1 operator available to choose from for flights from Islip Long Island Airport to Washington, D.C..
How old do you have to be to fly from Islip Long Island Airport to Washington, D.C.?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Islip Long Island Airport to Washington, D.C..
What documentation or ID do you need to fly to Washington, D.C.?
The required travel and health documents for your Washington, D.C. trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Washington, D.C.. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Islip, New York to Washington, D.C.?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Islip, New York to Washington, D.C. is Airbus A320-100/200 (20.85% of total bookings). The next most popular plane models are Boeing 737 MAX 8 (9.57%), Airbus A320neo (8.72%), and Airbus A321neo (7.87%).
What is the most popular airline from Islip, New York to Washington, D.C.?
momondo data reveals that the most frequently booked airline on the route from Islip, New York to Washington, D.C. is Southwest, representing 100% of all bookings.

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

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

Airline	Rating	Free Cancellation	Price
Southwest	PriceFrom $237	Free Cancellation	Rating 8.0 4,343 reviews		Search Southwest flights

Alexandria

National Harbor

Gettysburg

Arlington

Waldorf

Woodbridge

Laurel

Colonial Beach

Gaithersburg

Towson

Silver Spring

Fredericksburg

Rockville

Tysons

Manassas

Linthicum Heights

Springfield

Bethesda

Fairfax

College Park

Why use momondo?

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

It is quick and easy to find Islip to Washington, D.C. flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Washington, D.C. that suits you.

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

All flight searches from Islip to Washington, D.C. on momondo can be filtered to show those which offer flexible booking policies.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Islip to Washington, D.C..

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

If you are simply researching potential flights to Washington, D.C., momondo offers a useful price alert feature which will track prices for flights to Washington, D.C. from Islip and alert you when they change.

An easier way to manage your Washington, D.C. trip

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Fly into one of these airports located in Washington, D.C.

Washington, D.C. Reagan-National Airport

Washington, D.C. Dulles Intl Airport

Cheap flights from Islip, New York to Washington, D.C. from $95

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

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

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

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

momondo Fare Finder

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

See travel insights to Washington, D.C. from

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

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

What is the cheapest day to depart on your flight to Washington, D.C.?

What is the cheapest time of day to depart on your flight to Washington, D.C.?

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

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

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

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

What airlines fly to Washington, D.C.?

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

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

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

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

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

Best Price Found

Fastest flight time

Direct flights

Airports in Washington, D.C.

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

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

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

Traveling to a place near Washington, D.C.?

Why use momondo?

An easier way to manage your Washington, D.C. 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.

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

Find better results for your trip to the United States

Fly into one of these airports located in Washington, D.C.

Airports listed have a maximum distance of 22.4 mi from Washington, D.C.

Fly your favorite airline to Washington, D.C.

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

Cabin classes currently available on flights to Washington, D.C.

List of cabin classes available on flights landing in Washington, D.C.. Availability may vary depending on flight origin and airline.

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