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Cheap flights from Seattle to New York from $211

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to New York departing on 4/17. 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
0 bags

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Find the cheapest flights from Seattle to New York

Cheap round-trip flights

Enter your travel dates to find the best prices.
Southwest Logo
10:30 pm - 2:30 pm
SEA
-
ISP
13h 00m
1 stop
Southwest Logo
10:20 am - 3:00 pm
ISP
-
SEA
7h 40m
1 stop
$472Southwest
Fri, Aug 21 - Mon, Aug 24
Southwest Logo
11:05 pm - 2:30 pm
SEA
-
ISP
12h 25m
2 stops
Southwest Logo
6:20 am - 3:00 pm
ISP
-
SEA
11h 40m
2 stops
$477Southwest
Fri, Aug 21 - Sun, Aug 23
Southwest Logo
10:30 pm - 2:30 pm
SEA
-
ISP
13h 00m
1 stop
Southwest Logo
6:20 am - 3:00 pm
ISP
-
SEA
11h 40m
2 stops
$478Southwest
Fri, Aug 21 - Sun, Aug 23
Southwest Logo
7:30 pm - 8:05 am
SEA
-
ISP
9h 35m
2 stops
Southwest Logo
6:00 am - 1:20 pm
ISP
-
SEA
10h 20m
1 stop
$482Southwest
Tue, Jun 16 - Tue, Jun 23
Southwest Logo
9:25 pm - 8:05 am
SEA
-
ISP
7h 40m
1 stop
Southwest Logo
6:00 am - 1:20 pm
ISP
-
SEA
10h 20m
1 stop
$513Southwest
Tue, Jun 16 - Tue, Jun 23
Southwest Logo
11:55 pm - 11:40 am
SEA
-
ISP
8h 45m
2 stops
Southwest Logo
12:20 pm - 10:30 pm
ISP
-
SEA
13h 10m
2 stops
$597Southwest
Fri, Mar 27 - Tue, Mar 31
Southwest Logo
11:55 pm - 11:40 am
SEA
-
ISP
8h 45m
2 stops
Southwest Logo
2:00 pm - 1:40 am
ISP
-
SEA
14h 40m
2 stops
$657Southwest
Sun, Mar 29 - Thu, Apr 2
Multiple Airlines Logo
10:48 pm - 6:44 pm
SEA
-
ISP
16h 56m
2 stops
Multiple Airlines Logo
9:59 am - 9:34 pm
ISP
-
SEA
14h 35m
1 stop
$1,468Multiple Airlines
Mon, Mar 30 - Fri, Apr 3
Multiple Airlines Logo
10:48 pm - 6:44 pm
SEA
-
ISP
16h 56m
2 stops
Multiple Airlines Logo
9:59 am - 9:34 pm
ISP
-
SEA
14h 35m
1 stop
$1,553Multiple Airlines
Sun, Mar 29 - Thu, Apr 2

Southwest flights from Seattle to Islip, New York

Our best Southwest deals on Seattle to Islip, New York flight tickets
Southwest
Aug 21
SEA10:30 pmSeattle/Tacoma Intl
13h 00m
1 stop
ISP2:30 pmIslip Long Island
Aug 24
ISP10:20 amIslip Long Island
7h 40m
1 stop
SEA3:00 pmSeattle/Tacoma Intl
$472
Southwest
Aug 21
SEA11:05 pmSeattle/Tacoma Intl
12h 25m
2 stops
ISP2:30 pmIslip Long Island
Aug 23
ISP6:20 amIslip Long Island
11h 40m
2 stops
SEA3:00 pmSeattle/Tacoma Intl
$477
Southwest
Aug 21
SEA10:30 pmSeattle/Tacoma Intl
13h 00m
1 stop
ISP2:30 pmIslip Long Island
Aug 23
ISP6:20 amIslip Long Island
11h 40m
2 stops
SEA3:00 pmSeattle/Tacoma Intl
$478

momondo Fare Finder

 
Customize your flight search to find flights from Seattle 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 16, 2026.
Use the filters below to find and compare flights from Seattle to Islip, New York that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleIslip

SEA - ISP

SEAISP

Seattle/Tacoma Intl

Fri 8/21

10:30 pm-2:30 pm

1 stop13h 00m

Islip Long Island

Mon 8/24

10:20 am-3:00 pm

1 stop7h 40m

$472

SeattleIslip

SEA - ISP

SEAISP

Seattle/Tacoma Intl

Fri 8/21

11:05 pm-2:30 pm

2 stops12h 25m

Islip Long Island

Sun 8/23

6:20 am-3:00 pm

2 stops11h 40m

$477

SeattleIslip

SEA - ISP

SEAISP

Seattle/Tacoma Intl

Fri 8/21

10:30 pm-2:30 pm

1 stop13h 00m

Islip Long Island

Sun 8/23

6:20 am-3:00 pm

2 stops11h 40m

$478

SeattleIslip

SEA - ISP

SEAISP

Seattle/Tacoma Intl

Tue 6/16

7:30 pm-8:05 am

2 stops9h 35m

Islip Long Island

Tue 6/23

6:00 am-1:20 pm

1 stop10h 20m

$482
Quickest round-trip

SeattleIslip

SEA - ISP

SEAISP

Seattle/Tacoma Intl

Tue 6/16

9:25 pm-8:05 am

1 stop7h 40m

Islip Long Island

Tue 6/23

6:00 am-1:20 pm

1 stop10h 20m

$513

SeattleIslip

SEA - ISP

SEAISP

Seattle/Tacoma Intl

Fri 3/27

11:55 pm-11:40 am

2 stops8h 45m

Islip Long Island

Tue 3/31

12:20 pm-10:30 pm

2 stops13h 10m

$597

SeattleIslip

SEA - ISP

SEAISP

Seattle/Tacoma Intl

Sun 3/29

11:55 pm-11:40 am

2 stops8h 45m

Islip Long Island

Thu 4/2

2:00 pm-1:40 am

2 stops14h 40m

$657

SeattleIslip

SEA - ISP

SEAISP

Seattle/Tacoma Intl

Mon 3/30

10:48 pm-6:44 pm

2 stops16h 56m

Islip Long Island

Fri 4/3

9:59 am-9:34 pm

1 stop14h 35m

$1,468

SeattleIslip

SEA - ISP

SEAISP

Seattle/Tacoma Intl

Sun 3/29

10:48 pm-6:44 pm

2 stops16h 56m

Islip Long Island

Thu 4/2

9:59 am-9:34 pm

1 stop14h 35m

$1,553
Cheapest one-way

SeattleIslip

SEA - ISP

SEAISP

Seattle/Tacoma Intl

Fri 4/17

4:20 pm-11:10 am

3 stops15h 50m

$211

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
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See travel insights to New York from

How to get the cheapest flight ticket from Seattle 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 Seattle/Tacoma Intl to Islip Long Island?

Southwest is the most popular carrier operating from Seattle/Tacoma Intl to Islip Long Island

What airlines fly to Islip, New York?

Alaska Airlines, United Airlines and Delta are the top three most popular airlines that fly to Islip, New York from Seattle according to our data. Alaska Airlines is the first choice among our users, with 58% of people opting to fly with this airline when traveling to Islip, New York. Keep in mind that there are 10 different airlines that fly to Islip, New York on a routine basis, so you have a few additional options to choose from.

When to book flights from Seattle to Islip, New York

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Islip, New York according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to Islip, New York (SEA to ISP) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Islip, New York

Fastest flight time

10h 05m

Direct flights

None
The fastest flight from Seattle to Islip, New York takes 10h 05m
There are no direct flights from Seattle to Islip, New York. There are no popular flight routes from Seattle to Islip, New York.
Search flight deals

  • How far is Seattle/Tacoma Intl to Islip Long Island by plane?

    Islip Long Island is 2436.8 mi away from Seattle/Tacoma Intl. Typically, this will take 10h 05m by plane in normal conditions.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Islip Long Island Airport?

    Prices for flights from Seattle/Tacoma Intl Airport to Islip Long Island Airport were last updated today.

  • How old do you have to be to fly from Seattle/Tacoma 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 Seattle/Tacoma Intl Airport to Islip Long Island Airport.

  • What documentation or ID do you need to fly to Islip Long Island Airport?

    The necessary travel and health documents for your Islip Long Island Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking 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
Montauk
Riverhead
Sag Harbor
Southampton
Amagansett

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Islip?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Seattle to Islip. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Seattle to Islip with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Seattle to Islip flights to just show those with flexible booking policies.

How can momondo help me find flights from Seattle to Islip?

Once you have performed a search for Seattle 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 Seattle to Islip right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Seattle to Islip now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Islip and let you know when they change.

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