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Cheap flights from Washington, D.C. Dulles Intl Airport to New York from $153

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 3/20. 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
8:15 am - 4:13 pm
IAD
-
ISP
7h 58m
1 stop
Frontier Logo
1:22 pm - 11:56 pm
ISP
-
IAD
34h 34m
2 stops
$356Frontier
Thu, Mar 12 - Mon, Mar 16
Multiple Airlines Logo
8:15 am - 12:33 pm
IAD
-
ISP
28h 18m
1 stop
Multiple Airlines Logo
12:00 pm - 8:06 pm
ISP
-
IAD
8h 06m
1 stop
$496Multiple Airlines
Sun, Mar 15 - Thu, Mar 19
Frontier Logo
11:28 am - 9:08 am
IAD
-
ISP
21h 40m
1 stop
Frontier Logo
7:30 am - 12:49 am
ISP
-
IAD
17h 19m
2 stops
$506Frontier
Sat, Jun 27 - Sat, Jul 11
Frontier Logo
5:28 pm - 9:08 am
IAD
-
ISP
15h 40m
1 stop
Frontier Logo
10:03 am - 12:49 am
ISP
-
IAD
14h 46m
2 stops
$539Frontier
Thu, Jun 25 - Mon, Jun 29
Multiple Airlines Logo
8:15 am - 3:49 pm
IAD
-
ISP
7h 34m
1 stop
Multiple Airlines Logo
10:31 am - 2:00 pm
ISP
-
IAD
27h 29m
2 stops
$570Multiple Airlines
Sun, Mar 15 - Thu, Mar 19
Frontier Logo
3:57 pm - 11:59 pm
IAD
-
ISP
8h 02m
1 stop
Frontier Logo
12:08 pm - 10:11 am
ISP
-
IAD
22h 03m
1 stop
$614Frontier
Sat, Apr 11 - Sun, Apr 12
Frontier Logo
2:39 pm - 10:13 am
IAD
-
ISP
19h 34m
1 stop
Frontier Logo
1:42 pm - 12:31 am
ISP
-
IAD
10h 49m
2 stops
$679Frontier
Thu, Mar 26 - Fri, Mar 27
Multiple Airlines Logo
2:39 pm - 9:48 am
IAD
-
ISP
19h 09m
1 stop
Multiple Airlines Logo
9:59 am - 12:21 am
ISP
-
IAD
38h 22m
2 stops
$682Multiple Airlines
Fri, Mar 13 - Tue, Mar 17
Frontier Logo
3:57 pm - 11:57 pm
IAD
-
ISP
8h 00m
1 stop
Frontier Logo
5:45 am - 3:12 pm
ISP
-
IAD
9h 27m
1 stop
$704Frontier
Sat, Apr 4 - Sun, Apr 5
Frontier Logo
5:05 am - 4:13 pm
IAD
-
ISP
35h 08m
2 stops
Frontier Logo
7:30 pm - 7:42 am
ISP
-
IAD
12h 12m
1 stop
$772Frontier
Sat, Mar 28 - Sat, Apr 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
Jun 27
IAD11:28 amWashington, D.C. Dulles Intl
21h 40m
1 stop
ISP9:08 amIslip Long Island
Jul 11
ISP7:30 amIslip Long Island
17h 19m
2 stops
IAD12:49 amWashington, D.C. Dulles Intl
$506
Frontier
Jun 25
IAD5:28 pmWashington, D.C. Dulles Intl
15h 40m
1 stop
ISP9:08 amIslip Long Island
Jun 29
ISP10:03 amIslip Long Island
14h 46m
2 stops
IAD12:49 amWashington, D.C. Dulles Intl
$539
Frontier
Apr 11
IAD3:57 pmWashington, D.C. Dulles Intl
8h 02m
1 stop
ISP11:59 pmIslip Long Island
Apr 12
ISP12:08 pmIslip Long Island
22h 03m
1 stop
IAD10:11 amWashington, D.C. Dulles Intl
$614

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

Our best Breeze Airways deals on Washington, D.C. Dulles Intl Airport to Islip, New York flight tickets
Breeze Airways
Mar 5
IAD2:10 pmWashington, D.C. Dulles Intl
21h 05m
1 stop
ISP11:15 amIslip Long Island
Mar 8
ISP11:55 amIslip Long Island
26h 23m
3 stops
IAD2:18 pmWashington, D.C. Dulles Intl
$1,098
Breeze Airways
Mar 15
IAD2:10 pmWashington, D.C. Dulles Intl
21h 05m
1 stop
ISP11:15 amIslip Long Island
Mar 19
ISP11:55 amIslip Long Island
26h 23m
3 stops
IAD2:18 pmWashington, D.C. Dulles Intl
$1,416

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 March 1, 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

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Thu 3/12

8:15 am-4:13 pm

1 stop7h 58m

Islip Long Island

Mon 3/16

1:22 pm-11:56 pm

2 stops34h 34m

$356

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Sun 3/15

8:15 am-12:33 pm

1 stop28h 18m

Islip Long Island

Thu 3/19

12:00 pm-8:06 pm

1 stop8h 06m

$496

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Sat 6/27

11:28 am-9:08 am

1 stop21h 40m

Islip Long Island

Sat 7/11

7:30 am-12:49 am

2 stops17h 19m

$506

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Thu 6/25

5:28 pm-9:08 am

1 stop15h 40m

Islip Long Island

Mon 6/29

10:03 am-12:49 am

2 stops14h 46m

$539

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Sun 3/15

8:15 am-3:49 pm

1 stop7h 34m

Islip Long Island

Thu 3/19

10:31 am-2:00 pm

2 stops27h 29m

$570

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Sat 4/11

3:57 pm-11:59 pm

1 stop8h 02m

Islip Long Island

Sun 4/12

12:08 pm-10:11 am

1 stop22h 03m

$614

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Thu 3/26

2:39 pm-10:13 am

1 stop19h 34m

Islip Long Island

Fri 3/27

1:42 pm-12:31 am

2 stops10h 49m

$679

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Fri 3/13

2:39 pm-9:48 am

1 stop19h 09m

Islip Long Island

Tue 3/17

9:59 am-12:21 am

2 stops38h 22m

$682

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Sat 4/4

3:57 pm-11:57 pm

1 stop8h 00m

Islip Long Island

Sun 4/5

5:45 am-3:12 pm

1 stop9h 27m

$704

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Sat 3/28

5:05 am-4:13 pm

2 stops35h 08m

Islip Long Island

Sat 4/4

7:30 pm-7:42 am

1 stop12h 12m

$772

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 and Breeze Airways are the most popular carriers 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

8h 00m

Direct flights

None
The fastest flight from Washington, D.C. Dulles Intl Airport to Islip, New York takes 8h 00m
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 8h 00m.

  • 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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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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