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Cheap flights from Washington, D.C. Dulles Intl Airport to New York from $88

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 8/16. 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

Frontier Logo
9:33 pm - 9:13 amIAD-ISP
11h 40m1 stop
Frontier Logo
2:49 pm - 5:38 pmISP-IAD
26h 49m1 stop
$195Frontier
Find Deal
Thu, Aug 21 - Sat, Aug 23
Frontier Logo
9:33 pm - 8:54 amIAD-ISP
11h 21m1 stop
Frontier Logo
9:39 am - 8:38 pmISP-IAD
10h 59m1 stop
$198Frontier
Find Deal
Thu, Oct 9 - Mon, Oct 13
Frontier Logo
6:52 pm - 1:59 pmIAD-ISP
19h 07m1 stop
Frontier Logo
6:05 am - 8:48 pmISP-IAD
14h 43m1 stop
$205Frontier
Find Deal
Fri, Aug 29 - Sun, Aug 31
Frontier Logo
6:52 pm - 1:59 pmIAD-ISP
19h 07m1 stop
Frontier Logo
8:59 am - 8:48 pmISP-IAD
11h 49m1 stop
$317Frontier
Find Deal
Fri, Aug 22 - Mon, Aug 25
Frontier Logo
9:33 pm - 9:13 amIAD-ISP
11h 40m1 stop
Frontier Logo
8:59 am - 8:48 pmISP-IAD
11h 49m1 stop
$336Frontier
Find Deal
Thu, Aug 21 - Mon, Aug 25
Frontier Logo
6:33 pm - 12:16 pmIAD-ISP
17h 43m1 stop
Frontier Logo
8:59 am - 8:48 pmISP-IAD
11h 49m1 stop
$337Frontier
Find Deal
Thu, Aug 28 - Mon, Sep 1
Frontier Logo
6:52 pm - 1:59 pmIAD-ISP
19h 07m1 stop
Frontier Logo
8:59 am - 8:48 pmISP-IAD
11h 49m1 stop
$363Frontier
Find Deal
Fri, Aug 29 - Mon, Sep 1
Frontier Logo
6:33 pm - 12:16 pmIAD-ISP
17h 43m1 stop
Frontier Logo
8:59 am - 8:48 pmISP-IAD
11h 49m1 stop
$367Frontier
Find Deal
Thu, Aug 28 - Mon, Sep 1
Logo
10:18 pm - 10:58 amIAD-ISP
12h 40m1 stop
Logo
7:30 am - 2:43 pmISP-IAD
7h 13m1 stop
$699
Find Deal
Wed, Sep 3 - Fri, Sep 5
Logo
10:18 pm - 1:24 pmIAD-ISP
15h 06m1 stop
Logo
7:30 am - 10:39 pmISP-IAD
15h 09m2 stops
$704
Find Deal
Wed, Sep 3 - Fri, Sep 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
Aug 21
IAD9:33 pmWashington, D.C. Dulles Intl
11h 40m
1 stop
ISP9:13 amIslip Long Island
Aug 23
ISP2:49 pmIslip Long Island
26h 49m
1 stop
IAD5:38 pmWashington, D.C. Dulles Intl
$195
Find similar
Frontier
Oct 9
IAD9:33 pmWashington, D.C. Dulles Intl
11h 21m
1 stop
ISP8:54 amIslip Long Island
Oct 13
ISP9:39 amIslip Long Island
10h 59m
1 stop
IAD8:38 pmWashington, D.C. Dulles Intl
$198
Find similar
Frontier
Aug 11
IAD5:59 pmWashington, D.C. Dulles Intl
21h 43m
1 stop
ISP3:42 pmIslip Long Island
Aug 14
ISP2:05 pmIslip Long Island
27h 09m
1 stop
IAD5:14 pmWashington, D.C. Dulles Intl
$205
Find similar

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 July 31, 2025.
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

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Thu 8/21

9:33 pm-9:13 am

1 stop11h 40m

Islip Long Island

Sat 8/23

2:49 pm-5:38 pm

1 stop26h 49m

$195

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Thu 10/9

9:33 pm-8:54 am

1 stop11h 21m

Islip Long Island

Mon 10/13

9:39 am-8:38 pm

1 stop10h 59m

$198

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Fri 8/29

6:52 pm-1:59 pm

1 stop19h 07m

Islip Long Island

Sun 8/31

6:05 am-8:48 pm

1 stop14h 43m

$205

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Fri 8/22

6:52 pm-1:59 pm

1 stop19h 07m

Islip Long Island

Mon 8/25

8:59 am-8:48 pm

1 stop11h 49m

$317

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Thu 8/21

9:33 pm-9:13 am

1 stop11h 40m

Islip Long Island

Mon 8/25

8:59 am-8:48 pm

1 stop11h 49m

$336

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Thu 8/28

6:33 pm-12:16 pm

1 stop17h 43m

Islip Long Island

Mon 9/1

8:59 am-8:48 pm

1 stop11h 49m

$337

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Fri 8/29

6:52 pm-1:59 pm

1 stop19h 07m

Islip Long Island

Mon 9/1

8:59 am-8:48 pm

1 stop11h 49m

$363

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Thu 8/28

6:33 pm-12:16 pm

1 stop17h 43m

Islip Long Island

Mon 9/1

8:59 am-8:48 pm

1 stop11h 49m

$367

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Wed 9/3

10:18 pm-10:58 am

1 stop12h 40m

Islip Long Island

Fri 9/5

7:30 am-2:43 pm

1 stop7h 13m

$699

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Wed 9/3

10:18 pm-1:24 pm

1 stop15h 06m

Islip Long Island

Fri 9/5

7:30 am-10:39 pm

2 stops15h 09m

$704

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 day to depart on your flight to Islip, New York?

The cheapest day to depart from Washington, D.C. Dulles Intl Airport to Islip, New York is on a Tuesday. Travelers who choose to depart for Islip, New York on a Tuesday will often find tickets for as low as $296. The most expensive day to fly to Islip, New York is Sunday, with ticket prices averaging around $487.

What is the cheapest time of day to depart on your flight to Islip, New York?

Flying to Islip, New York from Washington, D.C. Dulles Intl Airport in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $337 when looking at flights departing in the afternoon. Flights to Islip, New York are more costly in the morning, with an average ticket price of $377. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

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

Best Price Found

$88

Fastest flight time

4h 06m

Direct flights

None

Airports in Islip, New York

1 airport
The best one-way flight to Islip, New York from Washington, D.C. Dulles Intl Airport in the past 72 hours is $88. The best round-trip flight deal from Washington, D.C. Dulles Intl Airport to Islip, New York found on momondo in the last 72 hours is $195.
The fastest flight from Washington, D.C. Dulles Intl Airport to Islip, New York takes 4h 06m
There are no direct flights from Washington, D.C. Dulles Intl Airport to Islip, New York. Popular non-direct route for this connection is Washington, D.C. Dulles Intl Airport - Islip Long Island Airport.
There is 1 airport near Islip, New York: Islip Long Island (ISP)
Search flight deals

  • 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 4h 34m.

  • 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?

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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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