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Cheap flights from Islip, New York to Washington, D.C. from $68

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Islip, New York to Washington, D.C. departing on 2/2. 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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Find the cheapest flights from Islip, New York to Washington, D.C.

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
3:34 pm - 8:24 am
ISP
-
BWI
16h 50m1 stop
Multiple Airlines Logo
6:53 pm - 1:31 pm
BWI
-
ISP
18h 38m2 stops
$203Multiple Airlines
Fri, Feb 20 - Sun, Feb 22
Frontier Logo
7:53 pm - 12:36 am
ISP
-
BWI
28h 43m2 stops
Frontier Logo
6:15 am - 8:47 pm
BWI
-
ISP
14h 32m1 stop
$211Frontier
Sun, Jan 25 - Fri, Jan 30
Multiple Airlines Logo
3:34 pm - 10:53 pm
ISP
-
BWI
7h 19m1 stop
Multiple Airlines Logo
6:50 pm - 1:31 pm
BWI
-
ISP
18h 41m2 stops
$215Multiple Airlines
Fri, Feb 20 - Sun, Feb 22
Multiple Airlines Logo
7:43 pm - 11:17 am
ISP
-
BWI
15h 34m1 stop
Multiple Airlines Logo
6:15 pm - 8:40 am
BWI
-
ISP
14h 25m1 stop
$222Multiple Airlines
Thu, Feb 5 - Sat, Feb 7
Frontier Logo
3:34 pm - 8:24 am
ISP
-
BWI
16h 50m1 stop
Frontier Logo
6:53 pm - 7:38 am
BWI
-
ISP
12h 45m1 stop
$226Frontier
Fri, Feb 20 - Sun, Feb 22
Multiple Airlines Logo
9:43 pm - 11:17 am
ISP
-
BWI
13h 34m1 stop
Multiple Airlines Logo
9:55 pm - 1:31 pm
BWI
-
ISP
15h 36m2 stops
$252Multiple Airlines
Fri, Feb 6 - Sun, Feb 8
Multiple Airlines Logo
11:55 am - 11:47 pm
ISP
-
BWI
11h 52m2 stops
Multiple Airlines Logo
11:30 am - 8:47 pm
BWI
-
ISP
9h 17m1 stop
$258Multiple Airlines
Thu, Jan 29 - Fri, Jan 30
Southwest Logo
9:15 am - 3:45 pm
ISP
-
DCA
6h 30m1 stop
Southwest Logo
7:55 am - 2:35 pm
DCA
-
ISP
6h 40m1 stop
$300Southwest
Tue, Feb 3 - Tue, Feb 10
Southwest Logo
9:15 am - 6:00 pm
ISP
-
DCA
8h 45m2 stops
Southwest Logo
7:55 am - 2:35 pm
DCA
-
ISP
6h 40m1 stop
$305Southwest
Tue, Feb 3 - Tue, Feb 10
JetBlue Logo
10:00 am - 6:00 pm
ISP
-
DCA
8h 00m1 stop
JetBlue Logo
9:50 am - 8:52 am
DCA
-
ISP
23h 02m1 stop
$317JetBlue
Wed, Jan 21 - Sun, Jan 25

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
Feb 12
ISP1:10 pmIslip Long Island
1h 20m
BWI2:30 pmBaltimore/Washington
Feb 17
BWI10:45 amBaltimore/Washington
1h 10m
ISP11:55 amIslip Long Island
$278
Southwest
Apr 8
ISP9:00 amIslip Long Island
1h 20m
BWI10:20 amBaltimore/Washington
Apr 10
BWI10:20 pmBaltimore/Washington
1h 10m
ISP11:30 pmIslip Long Island
$293
Southwest
Feb 3
ISP9:15 amIslip Long Island
6h 30m
1 stop
DCA3:45 pmWashington, D.C. Reagan-National
Feb 10
DCA7:55 amWashington, D.C. Reagan-National
6h 40m
1 stop
ISP2:35 pmIslip Long Island
$300

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
Jan 25
ISP7:53 pmIslip Long Island
28h 43m
2 stops
BWI12:36 amBaltimore/Washington
Jan 30
BWI6:15 amBaltimore/Washington
14h 32m
1 stop
ISP8:47 pmIslip Long Island
$211
Frontier
Feb 20
ISP3:34 pmIslip Long Island
16h 50m
1 stop
BWI8:24 amBaltimore/Washington
Feb 22
BWI6:53 pmBaltimore/Washington
12h 45m
1 stop
ISP7:38 amIslip Long Island
$226
Frontier
Jan 25
ISP7:53 pmIslip Long Island
22h 08m
1 stop
BWI6:01 pmBaltimore/Washington
Jan 30
BWI6:15 amBaltimore/Washington
14h 32m
1 stop
ISP8:47 pmIslip Long Island
$274

momondo Fare Finder

 
Customize your flight search to find flights from Islip, New York to Washington, D.C. that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated January 8, 2026.
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

IslipBaltimore

ISP - BWI

ISPBWI

Islip Long Island

Fri 2/20

3:34 pm-8:24 am

1 stop16h 50m

Baltimore/Washington

Sun 2/22

6:53 pm-1:31 pm

2 stops18h 38m

$203

IslipBaltimore

ISP - BWI

ISPBWI

Islip Long Island

Sun 1/25

7:53 pm-12:36 am

2 stops28h 43m

Baltimore/Washington

Fri 1/30

6:15 am-8:47 pm

1 stop14h 32m

$211

IslipBaltimore

ISP - BWI

ISPBWI

Islip Long Island

Fri 2/20

3:34 pm-10:53 pm

1 stop7h 19m

Baltimore/Washington

Sun 2/22

6:50 pm-1:31 pm

2 stops18h 41m

$215

IslipBaltimore

ISP - BWI

ISPBWI

Islip Long Island

Thu 2/5

7:43 pm-11:17 am

1 stop15h 34m

Baltimore/Washington

Sat 2/7

6:15 pm-8:40 am

1 stop14h 25m

$222

IslipBaltimore

ISP - BWI

ISPBWI

Islip Long Island

Fri 2/20

3:34 pm-8:24 am

1 stop16h 50m

Baltimore/Washington

Sun 2/22

6:53 pm-7:38 am

1 stop12h 45m

$226

IslipBaltimore

ISP - BWI

ISPBWI

Islip Long Island

Fri 2/6

9:43 pm-11:17 am

1 stop13h 34m

Baltimore/Washington

Sun 2/8

9:55 pm-1:31 pm

2 stops15h 36m

$252

IslipBaltimore

ISP - BWI

ISPBWI

Islip Long Island

Thu 1/29

11:55 am-11:47 pm

2 stops11h 52m

Baltimore/Washington

Fri 1/30

11:30 am-8:47 pm

1 stop9h 17m

$258

IslipWashington, D.C.

ISP - DCA

ISPDCA

Islip Long Island

Tue 2/3

9:15 am-3:45 pm

1 stop6h 30m

Washington, D.C. Reagan-National

Tue 2/10

7:55 am-2:35 pm

1 stop6h 40m

$300

IslipWashington, D.C.

ISP - DCA

ISPDCA

Islip Long Island

Tue 2/3

9:15 am-6:00 pm

2 stops8h 45m

Washington, D.C. Reagan-National

Tue 2/10

7:55 am-2:35 pm

1 stop6h 40m

$305

IslipWashington, D.C.

ISP - DCA

ISPDCA

Islip Long Island

Wed 1/21

10:00 am-6:00 pm

1 stop8h 00m

Washington, D.C. Reagan-National

Sun 1/25

9:50 am-8:52 am

1 stop23h 02m

$317

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Washington, D.C. from

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

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 $342. 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 $441.

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 $441. 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 50% 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

$196

Fastest flight time

1h 20m

Direct flights

Every day

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 $196. The best round-trip flight deal from Islip, New York to Washington, D.C. found on momondo in the last 72 hours is $317.
The fastest flight from Islip, New York to Washington, D.C. takes 1h 20m
Direct flights go from Islip, New York to Washington, D.C. every day.
There are 2 airports in Washington, D.C.. From Islip, New York there are direct flights to Baltimore/Washington (BWI).
Search flight deals

  • 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 20m.

  • 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.?

  • 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.?

  • What is the most popular airline 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
Airline
Rating
Free Cancellation
Price
SouthwestPriceFrom $242Free CancellationRating
8.0
4,250 reviews
Search Southwest flights

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

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
National Harbor
Gettysburg
Arlington
Waldorf
Woodbridge
Tysons
Laurel
Colonial Beach
Silver Spring
Towson
Fredericksburg
Rockville
Gaithersburg
Manassas
Fairfax
Springfield
Glen Burnie
Linthicum Heights
Reston

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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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.
Washington, D.C. Reagan-National Airport
Washington, D.C. Dulles Intl Airport