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Cheap flights from Washington, D.C. Dulles Intl Airport to New York from $55

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 1/15. 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.
Frontier Logo
8:37 pm - 5:42 pmIAD-ISP
21h 05m1 stop
Frontier Logo
8:29 pm - 2:29 pmISP-IAD
18h 00m2 stops
$177Frontier
Find Deal
seg, nov 17 - ter, dez 2
Frontier Logo
2:11 pm - 11:59 pmIAD-ISP
9h 48m1 stop
Frontier Logo
10:19 am - 8:24 pmISP-IAD
10h 05m1 stop
$190Frontier
Find Deal
seg, nov 24 - sáb, dez 6
Frontier Logo
8:44 am - 8:14 pmIAD-ISP
11h 30m1 stop
Frontier Logo
10:19 am - 8:24 pmISP-IAD
10h 05m1 stop
$210Frontier
Find Deal
ter, nov 25 - sáb, dez 6
Frontier Logo
2:11 pm - 11:59 pmIAD-ISP
9h 48m1 stop
Frontier Logo
9:09 pm - 7:45 amISP-IAD
10h 36m1 stop
$290Frontier
Find Deal
seg, nov 24 - ter, nov 25
Frontier Logo
5:26 pm - 11:59 pmIAD-ISP
6h 33m1 stop
Frontier Logo
10:19 am - 8:24 pmISP-IAD
10h 05m1 stop
$320Frontier
Find Deal
sex, nov 21 - sáb, dez 6
Frontier Logo
2:11 pm - 11:59 pmIAD-ISP
9h 48m1 stop
Frontier Logo
11:15 am - 8:24 pmISP-IAD
9h 09m1 stop
$350Frontier
Find Deal
seg, nov 24 - dom, dez 7
Frontier Logo
8:44 am - 7:30 pmIAD-ISP
10h 46m1 stop
Frontier Logo
10:19 am - 8:24 pmISP-IAD
10h 05m1 stop
$360Frontier
Find Deal
dom, nov 23 - sáb, dez 6
Frontier Logo
8:44 am - 8:14 pmIAD-ISP
11h 30m1 stop
Frontier Logo
11:15 am - 8:24 pmISP-IAD
9h 09m1 stop
$370Frontier
Find Deal
ter, nov 25 - dom, dez 7
Multiple Airlines Logo
7:05 am - 8:05 pmIAD-ISP
13h 00m2 stops
Multiple Airlines Logo
12:37 pm - 8:26 amISP-IAD
19h 49m1 stop
$453Multiple Airlines
Find Deal
qua, nov 26 - qua, dez 3
Multiple Airlines Logo
5:26 pm - 11:59 pmIAD-ISP
6h 33m1 stop
Multiple Airlines Logo
12:00 pm - 7:55 pmISP-IAD
7h 55m1 stop
$580Multiple Airlines
Find Deal
sex, nov 21 - qui, dez 4

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
Nov 17
IAD8:37 pmWashington, D.C. Dulles Intl
21h 05m
1 stop
ISP5:42 pmIslip Long Island
Dec 2
ISP8:29 pmIslip Long Island
18h 00m
2 stops
IAD2:29 pmWashington, D.C. Dulles Intl
$177
Find similar
Frontier
Nov 24
IAD2:11 pmWashington, D.C. Dulles Intl
9h 48m
1 stop
ISP11:59 pmIslip Long Island
Dec 6
ISP10:19 amIslip Long Island
10h 05m
1 stop
IAD8:24 pmWashington, D.C. Dulles Intl
$190
Find similar
Frontier
Nov 25
IAD8:44 amWashington, D.C. Dulles Intl
11h 30m
1 stop
ISP8:14 pmIslip Long Island
Dec 6
ISP10:19 amIslip Long Island
10h 05m
1 stop
IAD8:24 pmWashington, D.C. Dulles Intl
$210
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 novembro 4, 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

seg 11/17

8:37 pm-5:42 pm

1 stop21h 05m

Islip Long Island

ter 12/2

8:29 pm-2:29 pm

2 stops18h 00m

$177

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

seg 11/24

2:11 pm-11:59 pm

1 stop9h 48m

Islip Long Island

sáb 12/6

10:19 am-8:24 pm

1 stop10h 05m

$190

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

ter 11/25

8:44 am-8:14 pm

1 stop11h 30m

Islip Long Island

sáb 12/6

10:19 am-8:24 pm

1 stop10h 05m

$210

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

seg 11/24

2:11 pm-11:59 pm

1 stop9h 48m

Islip Long Island

ter 11/25

9:09 pm-7:45 am

1 stop10h 36m

$290

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

sex 11/21

5:26 pm-11:59 pm

1 stop6h 33m

Islip Long Island

sáb 12/6

10:19 am-8:24 pm

1 stop10h 05m

$320

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

seg 11/24

2:11 pm-11:59 pm

1 stop9h 48m

Islip Long Island

dom 12/7

11:15 am-8:24 pm

1 stop9h 09m

$350

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

dom 11/23

8:44 am-7:30 pm

1 stop10h 46m

Islip Long Island

sáb 12/6

10:19 am-8:24 pm

1 stop10h 05m

$360

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

ter 11/25

8:44 am-8:14 pm

1 stop11h 30m

Islip Long Island

dom 12/7

11:15 am-8:24 pm

1 stop9h 09m

$370

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

qua 11/26

7:05 am-8:05 pm

2 stops13h 00m

Islip Long Island

qua 12/3

12:37 pm-8:26 am

1 stop19h 49m

$453

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

sex 11/21

5:26 pm-11:59 pm

1 stop6h 33m

Islip Long Island

qui 12/4

12:00 pm-7:55 pm

1 stop7h 55m

$580

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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

Direct flights

None
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

  • 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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Riverhead
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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