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Cheap flights from Islip, New York to District of Columbia from $137

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 District of Columbia departing on 3/3. 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 District of Columbia

Cheap round-trip flights

Enter your travel dates to find the best prices.
Southwest Logo
5:10 pm - 10:50 pm
ISP
-
DCA
5h 40m
1 stop
Southwest Logo
6:00 am - 12:05 pm
DCA
-
ISP
6h 05m
1 stop
$327Southwest
Fri, May 15 - Mon, May 18
Southwest Logo
6:50 am - 6:05 pm
ISP
-
DCA
11h 15m
2 stops
Southwest Logo
6:00 am - 12:05 pm
DCA
-
ISP
6h 05m
1 stop
$338Southwest
Fri, May 15 - Mon, May 18
Southwest Logo
5:10 pm - 10:50 pm
ISP
-
DCA
5h 40m
1 stop
Southwest Logo
1:00 pm - 11:45 pm
DCA
-
ISP
10h 45m
1 stop
$342Southwest
Fri, May 22 - Sun, May 31
Southwest Logo
5:20 am - 12:00 pm
ISP
-
DCA
6h 40m
1 stop
Southwest Logo
6:55 am - 4:40 pm
DCA
-
ISP
9h 45m
1 stop
$372Southwest
Fri, Jun 5 - Sun, Jun 7
Southwest Logo
12:15 pm - 10:55 pm
ISP
-
DCA
10h 40m
2 stops
Southwest Logo
1:00 pm - 10:40 pm
DCA
-
ISP
9h 40m
1 stop
$393Southwest
Fri, Mar 6 - Fri, Mar 13
JetBlue Logo
9:39 am - 6:00 pm
ISP
-
DCA
8h 21m
1 stop
JetBlue Logo
7:00 am - 7:30 pm
DCA
-
ISP
12h 30m
1 stop
$398JetBlue
Thu, Mar 5 - Thu, Mar 12
Southwest Logo
6:50 am - 6:05 pm
ISP
-
DCA
11h 15m
2 stops
Southwest Logo
1:00 pm - 11:45 pm
DCA
-
ISP
10h 45m
1 stop
$413Southwest
Fri, May 22 - Sun, May 31
Southwest Logo
12:15 pm - 10:55 pm
ISP
-
DCA
10h 40m
2 stops
Southwest Logo
6:05 am - 4:30 pm
DCA
-
ISP
10h 25m
1 stop
$419Southwest
Thu, Mar 5 - Thu, Mar 12
Southwest Logo
11:55 am - 8:45 pm
ISP
-
DCA
8h 50m
1 stop
Southwest Logo
7:55 am - 2:35 pm
DCA
-
ISP
6h 40m
1 stop
$447Southwest
Sun, Mar 1 - Wed, Mar 4
Southwest Logo
9:15 am - 3:45 pm
ISP
-
DCA
6h 30m
1 stop
Southwest Logo
7:55 am - 2:35 pm
DCA
-
ISP
6h 40m
1 stop
$519Southwest
Tue, Feb 24 - Wed, Feb 25

Southwest flights from Islip, New York to District of Columbia

Our best Southwest deals on Islip, New York to District of Columbia flight tickets
Southwest
May 15
ISP5:10 pmIslip Long Island
5h 40m
1 stop
DCA10:50 pmWashington, D.C. Reagan-National
May 18
DCA6:00 amWashington, D.C. Reagan-National
6h 05m
1 stop
ISP12:05 pmIslip Long Island
$327
Southwest
Mar 10
ISP6:10 amIslip Long Island
5h 50m
1 stop
DCA12:00 pmWashington, D.C. Reagan-National
Mar 12
DCA1:00 pmWashington, D.C. Reagan-National
9h 40m
1 stop
ISP10:40 pmIslip Long Island
$332
Southwest
Mar 10
ISP2:20 pmIslip Long Island
8h 15m
2 stops
DCA10:35 pmWashington, D.C. Reagan-National
Mar 12
DCA1:00 pmWashington, D.C. Reagan-National
9h 40m
1 stop
ISP10:40 pmIslip Long Island
$338

JetBlue flights from Islip, New York to District of Columbia

Our best JetBlue deals on Islip, New York to District of Columbia flight tickets
JetBlue
Mar 5
ISP9:39 amIslip Long Island
8h 21m
1 stop
DCA6:00 pmWashington, D.C. Reagan-National
Mar 12
DCA7:00 amWashington, D.C. Reagan-National
12h 30m
1 stop
ISP7:30 pmIslip Long Island
$398
JetBlue
Feb 8
ISP10:00 amIslip Long Island
8h 00m
1 stop
DCA6:00 pmWashington, D.C. Reagan-National
Feb 10
DCA3:55 pmWashington, D.C. Reagan-National
19h 40m
1 stop
ISP11:35 amIslip Long Island
$634

momondo Fare Finder

 
Customize your flight search to find flights from Islip, New York to District of Columbia 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 February 5, 2026.
Use the filters below to find and compare flights from Islip, New York to District of Columbia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

IslipWashington, D.C.

ISP - DCA

ISPDCA

Islip Long Island

Fri 5/15

5:10 pm-10:50 pm

1 stop5h 40m

Washington, D.C. Reagan-National

Mon 5/18

6:00 am-12:05 pm

1 stop6h 05m

$327

IslipWashington, D.C.

ISP - DCA

ISPDCA

Islip Long Island

Fri 5/15

6:50 am-6:05 pm

2 stops11h 15m

Washington, D.C. Reagan-National

Mon 5/18

6:00 am-12:05 pm

1 stop6h 05m

$338

IslipWashington, D.C.

ISP - DCA

ISPDCA

Islip Long Island

Fri 5/22

5:10 pm-10:50 pm

1 stop5h 40m

Washington, D.C. Reagan-National

Sun 5/31

1:00 pm-11:45 pm

1 stop10h 45m

$342

IslipWashington, D.C.

ISP - DCA

ISPDCA

Islip Long Island

Fri 6/5

5:20 am-12:00 pm

1 stop6h 40m

Washington, D.C. Reagan-National

Sun 6/7

6:55 am-4:40 pm

1 stop9h 45m

$372

IslipWashington, D.C.

ISP - DCA

ISPDCA

Islip Long Island

Fri 3/6

12:15 pm-10:55 pm

2 stops10h 40m

Washington, D.C. Reagan-National

Fri 3/13

1:00 pm-10:40 pm

1 stop9h 40m

$393

IslipWashington, D.C.

ISP - DCA

ISPDCA

Islip Long Island

Thu 3/5

9:39 am-6:00 pm

1 stop8h 21m

Washington, D.C. Reagan-National

Thu 3/12

7:00 am-7:30 pm

1 stop12h 30m

$398

IslipWashington, D.C.

ISP - DCA

ISPDCA

Islip Long Island

Fri 5/22

6:50 am-6:05 pm

2 stops11h 15m

Washington, D.C. Reagan-National

Sun 5/31

1:00 pm-11:45 pm

1 stop10h 45m

$413

IslipWashington, D.C.

ISP - DCA

ISPDCA

Islip Long Island

Thu 3/5

12:15 pm-10:55 pm

2 stops10h 40m

Washington, D.C. Reagan-National

Thu 3/12

6:05 am-4:30 pm

1 stop10h 25m

$419

IslipWashington, D.C.

ISP - DCA

ISPDCA

Islip Long Island

Sun 3/1

11:55 am-8:45 pm

1 stop8h 50m

Washington, D.C. Reagan-National

Wed 3/4

7:55 am-2:35 pm

1 stop6h 40m

$447

IslipWashington, D.C.

ISP - DCA

ISPDCA

Islip Long Island

Tue 2/24

9:15 am-3:45 pm

1 stop6h 30m

Washington, D.C. Reagan-National

Wed 2/25

7:55 am-2:35 pm

1 stop6h 40m

$519

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 District of Columbia from

How to get the cheapest flight ticket from Islip, New York to District of Columbia

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 Islip Long Island to District of Columbia flight route?

Fly from Islip Long Island to Baltimore/Washington for the best Islip Long Island - District of Columbia flight prices

What cabin class options are available on Islip Long Island to District of Columbia flights?

There is only 1 cabin class available to choose from on Islip Long Island to District of Columbia flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Cheap Islip, New York to District of Columbia flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Islip, New York to District of Columbia

Fastest flight time

5h 40m

Direct flights

None
The fastest flight from Islip, New York to District of Columbia takes 5h 40m
There are no direct flights from Islip, New York to District of Columbia. There are no popular flight routes from Islip, New York to District of Columbia.
Search flight deals

  • When did momondo last update prices for flights from Islip Long Island Airport to District of Columbia?

    Prices for flights from Islip Long Island Airport to District of Columbia were last updated today.

  • How old do you have to be to fly from Islip Long Island Airport to District of Columbia?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Islip Long Island Airport to District of Columbia.

  • What documentation or ID do you need to fly to District of Columbia?

    The travel and health documents required for your trip to District of Columbia can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at District of Columbia. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Islip, New York to District of Columbia

Compare and see reviews for airlines that fly from Islip, New York to District of Columbia with momondo
Airline
Rating
Free Cancellation
Price
SouthwestPriceFrom $242Free CancellationRating
8.0
4,275 reviews
Search Southwest flights

Why use momondo?

Why should I use momondo to find a flight deal from Islip to District of Columbia?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Islip to District of Columbia for you.

Can I find flights from Islip to District of Columbia with flexible booking policies on momondo?

All flight searches from Islip to District of Columbia on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Islip to District of Columbia?

momondo provides multiple filters to help you find the best flight to District of Columbia from Islip. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Islip to District of Columbia right now. Can momondo alert me if prices change?

Price alerts on flights to District of Columbia from Islip 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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