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Cheap flights from Washington, D.C. Dulles Intl Airport to New York from $115

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 6/24. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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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.
Frontier Logo
1:32 pm - 9:53 am
IAD
-
ISP
20h 21m
1 stop
Frontier Logo
10:57 am - 12:47 pm
ISP
-
IAD
25h 50m
1 stop
$239Frontier
Tue, Jul 21 - Wed, Jul 29
Frontier Logo
1:32 pm - 9:53 am
IAD
-
ISP
20h 21m
1 stop
Frontier Logo
10:57 am - 12:47 pm
ISP
-
IAD
25h 50m
1 stop
$240Frontier
Tue, Jul 21 - Wed, Jul 29
Frontier Logo
1:38 pm - 3:56 pm
IAD
-
ISP
26h 18m
1 stop
Frontier Logo
9:52 pm - 12:53 pm
ISP
-
IAD
15h 01m
1 stop
$289Frontier
Mon, Jun 22 - Thu, Jun 25
Frontier Logo
1:23 pm - 8:57 pm
IAD
-
ISP
7h 34m
1 stop
Frontier Logo
9:52 pm - 12:53 pm
ISP
-
IAD
15h 01m
1 stop
$310Frontier
Sat, Jun 13 - Wed, Jun 17
Frontier Logo
1:23 pm - 8:57 pm
IAD
-
ISP
7h 34m
1 stop
Frontier Logo
9:52 pm - 12:53 pm
ISP
-
IAD
15h 01m
1 stop
$313Frontier
Sat, Jun 27 - Mon, Jun 29
Frontier Logo
1:38 pm - 8:57 pm
IAD
-
ISP
7h 19m
1 stop
Frontier Logo
9:52 pm - 12:53 pm
ISP
-
IAD
15h 01m
1 stop
$320Frontier
Wed, Jun 17 - Sun, Jun 21
Frontier Logo
12:28 pm - 7:01 pm
IAD
-
ISP
6h 33m
1 stop
Frontier Logo
10:48 am - 12:53 pm
ISP
-
IAD
26h 05m
1 stop
$329Frontier
Mon, Aug 17 - Wed, Aug 19
Multiple Airlines Logo
1:38 pm - 8:57 pm
IAD
-
ISP
7h 19m
1 stop
Multiple Airlines Logo
9:52 pm - 2:12 pm
ISP
-
IAD
16h 20m
2 stops
$339Multiple Airlines
Wed, Jun 17 - Sun, Jun 21
Frontier Logo
1:38 pm - 8:57 pm
IAD
-
ISP
7h 19m
1 stop
Frontier Logo
9:52 pm - 12:53 pm
ISP
-
IAD
15h 01m
1 stop
$340Frontier
Sun, Jun 14 - Thu, Jun 18
Frontier Logo
1:32 pm - 9:53 am
IAD
-
ISP
20h 21m
1 stop
Frontier Logo
10:57 am - 6:33 pm
ISP
-
IAD
7h 36m
1 stop
$347Frontier
Thu, Aug 6 - Mon, Aug 10

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
Jul 21
IAD1:32 pmWashington, D.C. Dulles Intl
20h 21m
1 stop
ISP9:53 amIslip Long Island
Jul 29
ISP10:57 amIslip Long Island
25h 50m
1 stop
IAD12:47 pmWashington, D.C. Dulles Intl
$239
Frontier
Jul 21
IAD1:32 pmWashington, D.C. Dulles Intl
20h 21m
1 stop
ISP9:53 amIslip Long Island
Jul 29
ISP10:57 amIslip Long Island
25h 50m
1 stop
IAD12:47 pmWashington, D.C. Dulles Intl
$240
Frontier
Jun 22
IAD1:38 pmWashington, D.C. Dulles Intl
26h 18m
1 stop
ISP3:56 pmIslip Long Island
Jun 25
ISP9:52 pmIslip Long Island
15h 01m
1 stop
IAD12:53 pmWashington, D.C. Dulles Intl
$289

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 June 3, 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

Tue 7/21

1:32 pm-9:53 am

1 stop20h 21m

Islip Long Island

Wed 7/29

10:57 am-12:47 pm

1 stop25h 50m

$239

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Tue 7/21

1:32 pm-9:53 am

1 stop20h 21m

Islip Long Island

Wed 7/29

10:57 am-12:47 pm

1 stop25h 50m

$240

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Mon 6/22

1:38 pm-3:56 pm

1 stop26h 18m

Islip Long Island

Thu 6/25

9:52 pm-12:53 pm

1 stop15h 01m

$289

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Sat 6/13

1:23 pm-8:57 pm

1 stop7h 34m

Islip Long Island

Wed 6/17

9:52 pm-12:53 pm

1 stop15h 01m

$310

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Sat 6/27

1:23 pm-8:57 pm

1 stop7h 34m

Islip Long Island

Mon 6/29

9:52 pm-12:53 pm

1 stop15h 01m

$313
Quickest round-trip

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Wed 6/17

1:38 pm-8:57 pm

1 stop7h 19m

Islip Long Island

Sun 6/21

9:52 pm-12:53 pm

1 stop15h 01m

$320

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Mon 8/17

12:28 pm-7:01 pm

1 stop6h 33m

Islip Long Island

Wed 8/19

10:48 am-12:53 pm

1 stop26h 05m

$329

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Wed 6/17

1:38 pm-8:57 pm

1 stop7h 19m

Islip Long Island

Sun 6/21

9:52 pm-2:12 pm

2 stops16h 20m

$339

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Sun 6/14

1:38 pm-8:57 pm

1 stop7h 19m

Islip Long Island

Thu 6/18

9:52 pm-12:53 pm

1 stop15h 01m

$340

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Thu 8/6

1:32 pm-9:53 am

1 stop20h 21m

Islip Long Island

Mon 8/10

10:57 am-6:33 pm

1 stop7h 36m

$347

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

6h 33m

Direct flights

None
The fastest flight from Washington, D.C. Dulles Intl Airport to Islip, New York takes 6h 33m
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 6h 33m.

  • 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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