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Cheap flights from Washington, D.C. Dulles Intl Airport to New York from $76

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. Dulles Intl Airport to New York departing on 5/16. 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 Washington, D.C. Dulles Intl Airport to New York

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
2:52 pm - 10:05 am
IAD
-
ISP
19h 13m
2 stops
Multiple Airlines Logo
5:38 pm - 4:22 pm
ISP
-
IAD
22h 44m
1 stop
$185Multiple Airlines
Fri, May 15 - Tue, May 19
Frontier Logo
7:12 pm - 10:05 am
IAD
-
ISP
14h 53m
1 stop
Frontier Logo
5:38 pm - 4:22 pm
ISP
-
IAD
22h 44m
1 stop
$196Frontier
Thu, May 14 - Tue, May 19
Frontier Logo
8:12 am - 9:13 am
IAD
-
ISP
25h 01m
1 stop
Frontier Logo
5:38 pm - 4:22 pm
ISP
-
IAD
22h 44m
1 stop
$197Frontier
Sat, May 2 - Tue, May 5
Frontier Logo
6:49 am - 5:58 pm
IAD
-
ISP
11h 09m
2 stops
Frontier Logo
5:38 pm - 4:22 pm
ISP
-
IAD
22h 44m
1 stop
$200Frontier
Sat, May 16 - Tue, May 19
Multiple Airlines Logo
7:27 pm - 10:05 am
IAD
-
ISP
14h 38m
1 stop
Multiple Airlines Logo
10:48 am - 10:22 am
ISP
-
IAD
23h 34m
2 stops
$214Multiple Airlines
Fri, Jun 5 - Wed, Jun 10
Frontier Logo
8:12 am - 9:13 am
IAD
-
ISP
25h 01m
1 stop
Frontier Logo
5:38 pm - 4:22 pm
ISP
-
IAD
22h 44m
1 stop
$218Frontier
Sat, May 2 - Tue, May 5
Frontier Logo
12:24 pm - 5:58 pm
IAD
-
ISP
29h 34m
1 stop
Frontier Logo
11:00 am - 3:16 pm
ISP
-
IAD
28h 16m
1 stop
$225Frontier
Fri, May 29 - Mon, Jun 1
Frontier Logo
7:27 pm - 10:05 am
IAD
-
ISP
14h 38m
1 stop
Frontier Logo
5:38 pm - 4:22 pm
ISP
-
IAD
22h 44m
1 stop
$230Frontier
Fri, May 15 - Tue, May 19
Frontier Logo
7:27 pm - 10:05 am
IAD
-
ISP
14h 38m
1 stop
Frontier Logo
10:48 am - 12:53 pm
ISP
-
IAD
26h 05m
1 stop
$235Frontier
Fri, Jun 5 - Wed, Jun 10
Frontier Logo
6:00 am - 7:36 pm
IAD
-
ISP
13h 36m
2 stops
Frontier Logo
5:38 pm - 4:22 pm
ISP
-
IAD
22h 44m
1 stop
$237Frontier
Fri, May 1 - Tue, May 5

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

Our best Frontier deals on Washington, D.C. Dulles Intl Airport to Islip, New York flight tickets
Frontier
May 14
IAD7:12 pmWashington, D.C. Dulles Intl
14h 53m
1 stop
ISP10:05 amIslip Long Island
May 19
ISP5:38 pmIslip Long Island
22h 44m
1 stop
IAD4:22 pmWashington, D.C. Dulles Intl
$196
Frontier
May 2
IAD8:12 amWashington, D.C. Dulles Intl
25h 01m
1 stop
ISP9:13 amIslip Long Island
May 5
ISP5:38 pmIslip Long Island
22h 44m
1 stop
IAD4:22 pmWashington, D.C. Dulles Intl
$197
Frontier
May 16
IAD6:49 amWashington, D.C. Dulles Intl
11h 09m
2 stops
ISP5:58 pmIslip Long Island
May 19
ISP5:38 pmIslip Long Island
22h 44m
1 stop
IAD4:22 pmWashington, D.C. Dulles Intl
$200

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. Dulles Intl Airport to Islip, New York 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 April 18, 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport 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

Fri 5/15

2:52 pm-10:05 am

2 stops19h 13m

Islip Long Island

Tue 5/19

5:38 pm-4:22 pm

1 stop22h 44m

$185

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Thu 5/14

7:12 pm-10:05 am

1 stop14h 53m

Islip Long Island

Tue 5/19

5:38 pm-4:22 pm

1 stop22h 44m

$196

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Sat 5/2

8:12 am-9:13 am

1 stop25h 01m

Islip Long Island

Tue 5/5

5:38 pm-4:22 pm

1 stop22h 44m

$197
Quickest round-trip

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Sat 5/16

6:49 am-5:58 pm

2 stops11h 09m

Islip Long Island

Tue 5/19

5:38 pm-4:22 pm

1 stop22h 44m

$200

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Fri 6/5

7:27 pm-10:05 am

1 stop14h 38m

Islip Long Island

Wed 6/10

10:48 am-10:22 am

2 stops23h 34m

$214

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Sat 5/2

8:12 am-9:13 am

1 stop25h 01m

Islip Long Island

Tue 5/5

5:38 pm-4:22 pm

1 stop22h 44m

$218

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Fri 5/29

12:24 pm-5:58 pm

1 stop29h 34m

Islip Long Island

Mon 6/1

11:00 am-3:16 pm

1 stop28h 16m

$225

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Fri 5/15

7:27 pm-10:05 am

1 stop14h 38m

Islip Long Island

Tue 5/19

5:38 pm-4:22 pm

1 stop22h 44m

$230

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Fri 6/5

7:27 pm-10:05 am

1 stop14h 38m

Islip Long Island

Wed 6/10

10:48 am-12:53 pm

1 stop26h 05m

$235

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Fri 5/1

6:00 am-7:36 pm

2 stops13h 36m

Islip Long Island

Tue 5/5

5:38 pm-4:22 pm

1 stop22h 44m

$237

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 New York from

How to get the cheapest flight ticket from Washington, D.C. Dulles Intl Airport 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

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

Frontier is the most popular carrier operating from Washington, D.C. Dulles Intl to Islip Long Island

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

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. Dulles Intl Airport 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. Dulles Intl Airport to Islip, New York (IAD to ISP) flight deals and tips

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

Fastest flight time

13h 36m

Direct flights

None
The fastest flight from Washington, D.C. Dulles Intl Airport to Islip, New York takes 13h 36m
There are no direct flights from Washington, D.C. Dulles Intl Airport to Islip, New York. There are no popular flight routes from Washington, D.C. Dulles Intl Airport to Islip, New York.
Search flight deals

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

  • How far is Washington, D.C. Dulles Intl to Islip Long Island by plane?

    There are 256.1 mi between Washington, D.C. Dulles Intl and Islip Long Island. A reasonable flight in good conditions will take 13h 36m.

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

    Prices for flights from Washington, D.C. Dulles Intl Airport to Islip Long Island Airport are refreshed on a daily basis.

  • How old do you have to be to fly from Washington, D.C. Dulles Intl Airport 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. Dulles Intl Airport 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.

Traveling to a place near New York?

Book flights to New York if you plan to visit one of these locations
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Sag Harbor
Southampton
Amagansett

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Washington, D.C. to Islip. momondo saves you time and could save you money on your trip.

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

Yes. momondo enables you to select and highlight flights to Islip from Washington, D.C. with this policy.

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

Once you have performed a search for Washington, D.C. to Islip flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Yes. momondo can track prices for Washington, D.C. to Islip flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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