What is the cheapest airline that flies from Islip Long Island to District of Columbia?

Southwest and JetBlue are the most popular carriers operating from Islip Long Island to District of Columbia

What airlines fly to District of Columbia?

United Airlines, Delta and American Airlines are the top three most popular airlines that fly to District of Columbia from Islip, New York according to our data. United Airlines is the first choice among our users, with 45% of people opting to fly with this airline when traveling to District of Columbia. Keep in mind that there are 5 different airlines that fly to District of Columbia on a routine basis, so you have a few additional options to choose from.

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.

$174 Cheap Flights from Islip, New York to District of Columbia in 2026

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 Islip, New York to District of Columbia

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

5:20 am - 12:00 pm

ISP

DCA

6h 40m

1 stop

5:25 pm - 11:40 pm

DCA

ISP

6h 15m

1 stop

$347Southwest

Mon, Jun 8 - Mon, Jun 15

1:15 pm - 11:55 pm

ISP

DCA

10h 40m

2 stops

6:00 am - 11:55 am

DCA

ISP

5h 55m

1 stop

$352Southwest

Fri, Sep 4 - Mon, Sep 7

5:20 am - 12:00 pm

ISP

DCA

6h 40m

1 stop

2:40 pm - 10:55 pm

DCA

ISP

8h 15m

1 stop

$357Southwest

Thu, Jun 18 - Sat, Jun 20

5:35 am - 11:10 am

ISP

DCA

5h 35m

1 stop

5:25 pm - 11:40 pm

DCA

ISP

6h 15m

1 stop

$367Southwest

Sat, Jun 6 - Fri, Jun 12

5:20 am - 3:55 pm

ISP

DCA

10h 35m

1 stop

6:55 am - 4:40 pm

DCA

ISP

9h 45m

1 stop

$378Southwest

Fri, Jun 12 - Sun, Jun 14

5:20 am - 12:00 pm

ISP

DCA

6h 40m

1 stop

4:30 pm - 12:15 am

DCA

ISP

7h 45m

1 stop

$382Southwest

Thu, Jun 18 - Sun, Jun 21

5:20 am - 12:00 pm

ISP

DCA

6h 40m

1 stop

2:40 pm - 10:55 pm

DCA

ISP

8h 15m

1 stop

$387Southwest

Thu, Jun 4 - Sat, Jun 6

5:20 am - 12:00 pm

ISP

DCA

6h 40m

1 stop

12:00 pm - 10:55 pm

DCA

ISP

10h 55m

2 stops

$392Southwest

Thu, Jun 4 - Sat, Jun 6

6:45 am - 3:50 pm

ISP

DCA

9h 05m

1 stop

6:55 am - 4:40 pm

DCA

ISP

9h 45m

1 stop

$393Southwest

Sun, Jun 7 - Sun, Jun 14

5:20 am - 12:00 pm

ISP

DCA

6h 40m

1 stop

4:40 pm - 10:35 pm

DCA

ISP

5h 55m

1 stop

$417Southwest

Mon, Jun 15 - Wed, Jun 17

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

Jun 8

ISP5:20 amIslip Long Island

6h 40m

1 stop

DCA12:00 pmWashington, D.C. Reagan-National

Jun 15

DCA5:25 pmWashington, D.C. Reagan-National

6h 15m

1 stop

ISP11:40 pmIslip Long Island

$347

Southwest

Sep 4

ISP1:15 pmIslip Long Island

10h 40m

2 stops

DCA11:55 pmWashington, D.C. Reagan-National

Sep 7

DCA6:00 amWashington, D.C. Reagan-National

5h 55m

1 stop

ISP11:55 amIslip Long Island

$352

Southwest

Jun 18

ISP5:20 amIslip Long Island

6h 40m

1 stop

DCA12:00 pmWashington, D.C. Reagan-National

Jun 20

DCA2:40 pmWashington, D.C. Reagan-National

8h 15m

1 stop

ISP10:55 pmIslip Long Island

$357

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

Jun 2

ISP12:25 pmIslip Long Island

10h 07m

1 stop

DCA10:32 pmWashington, D.C. Reagan-National

Jun 9

DCA7:10 amWashington, D.C. Reagan-National

6h 29m

1 stop

ISP1:39 pmIslip Long Island

$439

JetBlue

Jun 8

ISP12:25 pmIslip Long Island

10h 07m

1 stop

DCA10:32 pmWashington, D.C. Reagan-National

Jun 15

DCA7:10 amWashington, D.C. Reagan-National

7h 02m

1 stop

ISP2:12 pmIslip Long Island

$535

momondo Fare Finder

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

Cheapest round-trip

IslipWashington, D.C.

ISP - DCA

ISPDCA

Islip Long Island

Mon 6/8

5:20 am-12:00 pm

1 stop6h 40m

Washington, D.C. Reagan-National

Mon 6/15

5:25 pm-11:40 pm

1 stop6h 15m

$347

IslipWashington, D.C.

ISP - DCA

ISPDCA

Islip Long Island

Fri 9/4

1:15 pm-11:55 pm

2 stops10h 40m

Washington, D.C. Reagan-National

Mon 9/7

6:00 am-11:55 am

1 stop5h 55m

$352

IslipWashington, D.C.

ISP - DCA

ISPDCA

Islip Long Island

Thu 6/18

5:20 am-12:00 pm

1 stop6h 40m

Washington, D.C. Reagan-National

Sat 6/20

2:40 pm-10:55 pm

1 stop8h 15m

$357

Quickest round-trip

IslipWashington, D.C.

ISP - DCA

ISPDCA

Islip Long Island

Sat 6/6

5:35 am-11:10 am

1 stop5h 35m

Washington, D.C. Reagan-National

Fri 6/12

5:25 pm-11:40 pm

1 stop6h 15m

$367

IslipWashington, D.C.

ISP - DCA

ISPDCA

Islip Long Island

Fri 6/12

5:20 am-3:55 pm

1 stop10h 35m

Washington, D.C. Reagan-National

Sun 6/14

6:55 am-4:40 pm

1 stop9h 45m

$378

IslipWashington, D.C.

ISP - DCA

ISPDCA

Islip Long Island

Thu 6/18

5:20 am-12:00 pm

1 stop6h 40m

Washington, D.C. Reagan-National

Sun 6/21

4:30 pm-12:15 am

1 stop7h 45m

$382

IslipWashington, D.C.

ISP - DCA

ISPDCA

Islip Long Island

Thu 6/4

5:20 am-12:00 pm

1 stop6h 40m

Washington, D.C. Reagan-National

Sat 6/6

2:40 pm-10:55 pm

1 stop8h 15m

$387

IslipWashington, D.C.

ISP - DCA

ISPDCA

Islip Long Island

Thu 6/4

5:20 am-12:00 pm

1 stop6h 40m

Washington, D.C. Reagan-National

Sat 6/6

12:00 pm-10:55 pm

2 stops10h 55m

$392

IslipWashington, D.C.

ISP - DCA

ISPDCA

Islip Long Island

Sun 6/7

6:45 am-3:50 pm

1 stop9h 05m

Washington, D.C. Reagan-National

Sun 6/14

6:55 am-4:40 pm

1 stop9h 45m

$393

IslipWashington, D.C.

ISP - DCA

ISPDCA

Islip Long Island

Mon 6/15

5:20 am-12:00 pm

1 stop6h 40m

Washington, D.C. Reagan-National

Wed 6/17

4:40 pm-10:35 pm

1 stop5h 55m

$417

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 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

Prices

Airlines

What is the cheapest month to fly to District of Columbia?

In general, November is the cheapest month to fly from Islip, New York to District of Columbia. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $0. If you don’t want to visit District of Columbia in November, then you should wait until February to fly from Islip, New York, when ticket prices are also cheap, with an average price of $0.

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

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	6h 10m
Direct flights	None

The fastest flight from Islip, New York to District of Columbia takes 6h 10m

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

Frequently asked questions about flying from Islip, New York to District of Columbia

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
Southwest	PriceFrom $237	Free Cancellation	Rating 8.0 4,295 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.