What airlines fly to Seattle?

Alaska Airlines, United Airlines and Delta are the top three most popular airlines that fly to Seattle from Islip, New York according to our data. Alaska Airlines is the first choice among our users, with 50% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 7 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.

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

Prices for flights from Islip Long Island Airport to Seattle/Tacoma Intl Airport are refreshed on a daily basis.

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

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Islip Long Island Airport to Seattle/Tacoma Intl Airport.

What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

The required travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$409 Cheap Flights from Islip, New York to Seattle in 2026/27

Find the cheapest flights from Islip, New York to Seattle

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

12:30 pm - 9:35 pmISP Islip Long Island-SEA Seattle/Tacoma Intl

12h 05m2 stops Baltimore/Washington Phoenix Sky Harbor Intl

7:00 am - 9:30 pmSEA Seattle/Tacoma Intl-ISP Islip Long Island

11h 30m2 stops San Diego Baltimore/Washington

$409Southwest

Wed, Jan 6 - Wed, Jan 13

12:30 pm - 10:50 pmISP Islip Long Island-SEA Seattle/Tacoma Intl

13h 20m2 stops Baltimore/Washington Denver Intl

7:00 am - 9:45 pmSEA Seattle/Tacoma Intl-ISP Islip Long Island

11h 45m2 stops San Diego Baltimore/Washington

$468Southwest

Fri, Jan 1 - Tue, Jan 5

12:30 pm - 10:50 pmISP Islip Long Island-SEA Seattle/Tacoma Intl

13h 20m2 stops Baltimore/Washington Denver Intl

12:15 am - 4:15 pmSEA Seattle/Tacoma Intl-ISP Islip Long Island

13h 00m2 stops Chicago Midway Baltimore/Washington

$482Southwest

Fri, Jan 1 - Mon, Jan 4

12:30 pm - 10:50 pmISP Islip Long Island-SEA Seattle/Tacoma Intl

13h 20m2 stops Baltimore/Washington Denver Intl

7:00 am - 9:45 pmSEA Seattle/Tacoma Intl-ISP Islip Long Island

11h 45m2 stops San Diego Baltimore/Washington

$493Southwest

Fri, Jan 1 - Tue, Jan 5

12:30 pm - 10:40 pmISP Islip Long Island-SEA Seattle/Tacoma Intl

13h 10m2 stops Baltimore/Washington Chicago Midway

6:15 am - 11:40 pmSEA Seattle/Tacoma Intl-ISP Islip Long Island

14h 25m2 stops Chicago Midway Baltimore/Washington

$520Southwest

Wed, Feb 10 - Mon, Feb 15

12:30 pm - 11:35 pmISP Islip Long Island-SEA Seattle/Tacoma Intl

14h 05m2 stops Baltimore/Washington Chicago Midway

12:15 am - 4:15 pmSEA Seattle/Tacoma Intl-ISP Islip Long Island

13h 00m2 stops Chicago Midway Baltimore/Washington

$525Southwest

Fri, Jan 1 - Mon, Jan 4

4:55 pm - 1:45 amISP Islip Long Island-SEA Seattle/Tacoma Intl

11h 50m2 stops Baltimore/Washington Las Vegas Harry Reid Intl

12:15 am - 4:15 pmSEA Seattle/Tacoma Intl-ISP Islip Long Island

13h 00m2 stops Chicago Midway Baltimore/Washington

$588Southwest

Wed, Dec 30 - Mon, Jan 4

12:25 pm - 12:35 amISP Islip Long Island-SEA Seattle/Tacoma Intl

15h 10m2 stops Baltimore/Washington Chicago Midway

7:15 am - 11:50 pmSEA Seattle/Tacoma Intl-ISP Islip Long Island

13h 35m2 stops San Diego Baltimore/Washington

$606Southwest

Mon, Nov 23 - Mon, Nov 30

12:30 pm - 10:50 pmISP Islip Long Island-SEA Seattle/Tacoma Intl

13h 20m2 stops Baltimore/Washington Denver Intl

12:15 am - 2:55 pmSEA Seattle/Tacoma Intl-ISP Islip Long Island

11h 40m2 stops Chicago Midway Baltimore/Washington

$647Southwest

Tue, Nov 10 - Fri, Nov 13

12:30 pm - 10:50 pmISP Islip Long Island-SEA Seattle/Tacoma Intl

13h 20m2 stops Baltimore/Washington Denver Intl

6:30 am - 11:35 pmSEA Seattle/Tacoma Intl-ISP Islip Long Island

14h 05m2 stops San Jose Baltimore/Washington

$680Southwest

Wed, Nov 11 - Sun, Nov 15

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Southwest flights from Islip, New York to Seattle

Our best Southwest deals on Islip, New York to Seattle flight tickets

Southwest

Jan 6

ISP12:30 pmIslip Long Island

12h 05m

2 stops

SEA9:35 pmSeattle/Tacoma Intl

Jan 13

SEA7:00 amSeattle/Tacoma Intl

11h 30m

2 stops

ISP9:30 pmIslip Long Island

$409

Southwest

Jan 1

ISP12:30 pmIslip Long Island

13h 20m

2 stops

SEA10:50 pmSeattle/Tacoma Intl

Jan 5

SEA7:00 amSeattle/Tacoma Intl

11h 45m

2 stops

ISP9:45 pmIslip Long Island

$468

Southwest

Jan 1

ISP12:30 pmIslip Long Island

13h 20m

2 stops

SEA10:50 pmSeattle/Tacoma Intl

Jan 4

SEA12:15 amSeattle/Tacoma Intl

13h 00m

2 stops

ISP4:15 pmIslip Long Island

$482

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

IslipSeattle

ISP Islip Long Island - SEA Seattle/Tacoma Intl

ISPSEA

Islip Long Island

Wed 1/6

12:30 pm-9:35 pm

2 stops12h 05m

Seattle/Tacoma Intl

Wed 1/13

7:00 am-9:30 pm

2 stops11h 30m

$409

IslipSeattle

ISP Islip Long Island - SEA Seattle/Tacoma Intl

ISPSEA

Islip Long Island

Fri 1/1

12:30 pm-10:50 pm

2 stops13h 20m

Seattle/Tacoma Intl

Tue 1/5

7:00 am-9:45 pm

2 stops11h 45m

$468

IslipSeattle

ISP Islip Long Island - SEA Seattle/Tacoma Intl

ISPSEA

Islip Long Island

Fri 1/1

12:30 pm-10:50 pm

2 stops13h 20m

Seattle/Tacoma Intl

Mon 1/4

12:15 am-4:15 pm

2 stops13h 00m

$482

IslipSeattle

ISP Islip Long Island - SEA Seattle/Tacoma Intl

ISPSEA

Islip Long Island

Fri 1/1

12:30 pm-10:50 pm

2 stops13h 20m

Seattle/Tacoma Intl

Tue 1/5

7:00 am-9:45 pm

2 stops11h 45m

$493

IslipSeattle

ISP Islip Long Island - SEA Seattle/Tacoma Intl

ISPSEA

Islip Long Island

Wed 2/10

12:30 pm-10:40 pm

2 stops13h 10m

Seattle/Tacoma Intl

Mon 2/15

6:15 am-11:40 pm

2 stops14h 25m

$520

IslipSeattle

ISP Islip Long Island - SEA Seattle/Tacoma Intl

ISPSEA

Islip Long Island

Fri 1/1

12:30 pm-11:35 pm

2 stops14h 05m

Seattle/Tacoma Intl

Mon 1/4

12:15 am-4:15 pm

2 stops13h 00m

$525

IslipSeattle

ISP Islip Long Island - SEA Seattle/Tacoma Intl

ISPSEA

Islip Long Island

Wed 12/30

4:55 pm-1:45 am

2 stops11h 50m

Seattle/Tacoma Intl

Mon 1/4

12:15 am-4:15 pm

2 stops13h 00m

$588

IslipSeattle

ISP Islip Long Island - SEA Seattle/Tacoma Intl

ISPSEA

Islip Long Island

Mon 11/23

12:25 pm-12:35 am

2 stops15h 10m

Seattle/Tacoma Intl

Mon 11/30

7:15 am-11:50 pm

2 stops13h 35m

$606

IslipSeattle

ISP Islip Long Island - SEA Seattle/Tacoma Intl

ISPSEA

Islip Long Island

Tue 11/10

12:30 pm-10:50 pm

2 stops13h 20m

Seattle/Tacoma Intl

Fri 11/13

12:15 am-2:55 pm

2 stops11h 40m

$647

IslipSeattle

ISP Islip Long Island - SEA Seattle/Tacoma Intl

ISPSEA

Islip Long Island

Wed 11/11

12:30 pm-10:50 pm

2 stops13h 20m

Seattle/Tacoma Intl

Sun 11/15

6:30 am-11:35 pm

2 stops14h 05m

$680

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

How to get the cheapest flight ticket from Islip, New York to Seattle

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

Prices

Airlines

What is the cheapest day to depart on your flight to Seattle?

On average, the least expensive day to fly to Seattle from Islip, New York is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $470. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Monday is the most expensive day to depart from Islip, New York because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $558.

What is the cheapest time of day to depart on your flight to Seattle?

Flying to Seattle from Islip, New York in the evening is the least expensive time of day to depart. momondo users have found prices as low as $459 when looking at flights departing in the evening. Flights to Seattle are more costly at noon, with an average ticket price of $580. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

Can stopping save me money on Islip, New York to Seattle flights?

You could potentially save up to 25% on your flight if you consider stops on a Islip, New York to Seattle flight.

When to book flights from Islip, New York to Seattle

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

Estimated round-trip price

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

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

Best Price Found	$409
Fastest flight time	12h 05m
Direct flights	None

The best flight deal from Islip, New York to Seattle found on momondo in the last 72 hours is $409

The fastest flight from Islip, New York to Seattle takes 12h 05m

There are no direct flights from Islip, New York to Seattle. There are no popular flight routes from Islip, New York to Seattle.

Search flight deals

Frequently asked questions about flying from Islip, New York to Seattle

How far is Islip Long Island to Seattle/Tacoma Intl by plane?
Seattle/Tacoma Intl is 2436.8 mi away from Islip Long Island. By plane, this route typically takes 12h 05m.
When did momondo last update prices for flights from Islip Long Island Airport to Seattle/Tacoma Intl Airport?
Prices for flights from Islip Long Island Airport to Seattle/Tacoma Intl Airport are refreshed on a daily basis.
How old do you have to be to fly from Islip Long Island Airport to Seattle/Tacoma Intl Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Islip Long Island Airport to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The required travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

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Renton

Olympia

Redmond

Kent

Federal Way

Lakewood

Fife

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Puyallup

Tukwila

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Why use momondo?

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

Finding the right flight to Seattle from Islip is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Seattle quick and easy, saving you time and money.

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

Yes. momondo enables you to select and highlight flights to Seattle from Islip with this policy.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Seattle from Islip.

I’m not ready to book a flight from Islip to Seattle right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Seattle, momondo offers a useful price alert feature which will track prices for flights to Seattle from Islip and alert you when they change.