What airlines fly to State of Washington?

Alaska Airlines, United Airlines and Delta are the top three most popular airlines that fly to State of Washington from Islip according to our data. Alaska Airlines is the first choice among our users, with 43% of people opting to fly with this airline when traveling to State of Washington. Keep in mind that there are 10 different airlines that fly to State of Washington 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 Washington?

Prices for flights from Islip Long Island Airport to Washington were last updated today.

How many operators does momondo search for flights from Islip Long Island Airport to Washington?

As of September 2025, there is 1 operator available to choose from for flights from Islip Long Island Airport to Washington.

How old do you have to be to fly from Islip Long Island Airport to Washington?

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 Washington.

What documentation or ID do you need to fly to Washington?

The travel and health documents required for your trip to Washington can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Washington. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$267 Cheap Flights from Islip to Washington in 2025/26

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Find the cheapest flights from Islip to Washington

Round-trip

One-way

Last minute

Cheap round-trip flights

9:37 pm - 11:48 amISP-PDX

17h 11m2 stops

12:43 pm - 9:04 amPDX-ISP

17h 21m2 stops

$267Frontier

Find Deal

Thu, Oct 9 - Wed, Oct 15

9:27 pm - 1:03 pmISP-SEA

18h 36m2 stops

2:22 pm - 9:09 amSEA-ISP

15h 47m2 stops

$276Frontier

Find Deal

Sun, Nov 2 - Sun, Nov 9

9:37 pm - 11:48 amISP-PDX

17h 11m2 stops

12:43 pm - 9:44 amPDX-ISP

18h 01m2 stops

$310Frontier

Find Deal

Thu, Oct 9 - Tue, Oct 14

5:30 am - 4:35 pmISP-PDX

14h 05m2 stops

5:50 am - 10:05 pmPDX-ISP

13h 15m2 stops

$499Southwest

Find Deal

Fri, Oct 17 - Wed, Oct 22

6:05 am - 11:15 amISP-SEA

8h 10m1 stop

5:45 am - 9:35 pmSEA-ISP

12h 50m2 stops

$732Southwest

Find Deal

Wed, Oct 1 - Sat, Oct 18

5:30 am - 3:05 pmISP-SEA

12h 35m2 stops

6:15 pm - 12:10 pmSEA-ISP

14h 55m2 stops

$737Southwest

Find Deal

Wed, Oct 1 - Sat, Oct 18

7:30 am - 11:15 pmISP-SEA

18h 45m3 stops

7:37 pm - 7:45 pmSEA-ISP

21h 08m2 stops

$925Multiple Airlines

Find Deal

Wed, Oct 1 - Sat, Oct 18

4:33 pm - 10:08 pmISP-SEA

8h 35m1 stop

11:15 pm - 10:58 amSEA-ISP

8h 43m1 stop

$934Multiple Airlines

Find Deal

Thu, Oct 2 - Sat, Oct 11

4:33 pm - 10:08 pmISP-SEA

8h 35m1 stop

11:15 pm - 4:15 pmSEA-ISP

14h 00m1 stop

$944Multiple Airlines

Find Deal

Wed, Oct 1 - Sat, Oct 18

4:33 pm - 10:08 pmISP-SEA

8h 35m1 stop

11:15 pm - 10:58 amSEA-ISP

8h 43m1 stop

$980Multiple Airlines

Find Deal

Fri, Oct 3 - Sun, Oct 5

Frontier flights from Islip to State of Washington

Our best Frontier deals on Islip to State of Washington flight tickets

Frontier

Oct 9

ISP9:37 pmIslip Long Island

17h 11m

2 stops

PDX11:48 amPortland

Oct 15

PDX12:43 pmPortland

17h 21m

2 stops

ISP9:04 amIslip Long Island

$267

Find similar

Frontier

Nov 2

ISP9:27 pmIslip Long Island

18h 36m

2 stops

SEA1:03 pmSeattle/Tacoma Intl

Nov 9

SEA2:22 pmSeattle/Tacoma Intl

15h 47m

2 stops

ISP9:09 amIslip Long Island

$276

Find similar

Frontier

Oct 9

ISP9:37 pmIslip Long Island

17h 11m

2 stops

PDX11:48 amPortland

Oct 14

PDX12:43 pmPortland

18h 01m

2 stops

ISP9:44 amIslip Long Island

$310

Find similar

Southwest flights from Islip to State of Washington

Our best Southwest deals on Islip to State of Washington flight tickets

Southwest

Oct 17

ISP5:30 amIslip Long Island

14h 05m

2 stops

PDX4:35 pmPortland

Oct 22

PDX5:50 amPortland

13h 15m

2 stops

ISP10:05 pmIslip Long Island

$499

Find similar

Southwest

Oct 1

ISP6:05 amIslip Long Island

8h 10m

1 stop

SEA11:15 amSeattle/Tacoma Intl

Oct 18

SEA5:45 amSeattle/Tacoma Intl

12h 50m

2 stops

ISP9:35 pmIslip Long Island

$732

Find similar

Southwest

Oct 1

ISP5:30 amIslip Long Island

12h 35m

2 stops

SEA3:05 pmSeattle/Tacoma Intl

Oct 18

SEA6:15 pmSeattle/Tacoma Intl

14h 55m

2 stops

ISP12:10 pmIslip Long Island

$737

Find similar

Fly from

Fly to

Route

Depart

Return

Price

IslipPortland

ISP - PDX

ISPPDX

Islip Long Island

Thu 10/9

9:37 pm-11:48 am

2 stops17h 11m

Portland

Wed 10/15

12:43 pm-9:04 am

2 stops17h 21m

$267

IslipSeattle

ISP - SEA

ISPSEA

Islip Long Island

Sun 11/2

9:27 pm-1:03 pm

2 stops18h 36m

Seattle/Tacoma Intl

Sun 11/9

2:22 pm-9:09 am

2 stops15h 47m

$276

IslipPortland

ISP - PDX

ISPPDX

Islip Long Island

Thu 10/9

9:37 pm-11:48 am

2 stops17h 11m

Portland

Tue 10/14

12:43 pm-9:44 am

2 stops18h 01m

$310

IslipPortland

ISP - PDX

ISPPDX

Islip Long Island

Fri 10/17

5:30 am-4:35 pm

2 stops14h 05m

Portland

Wed 10/22

5:50 am-10:05 pm

2 stops13h 15m

$499

IslipSeattle

ISP - SEA

ISPSEA

Islip Long Island

Wed 10/1

6:05 am-11:15 am

1 stop8h 10m

Seattle/Tacoma Intl

Sat 10/18

5:45 am-9:35 pm

2 stops12h 50m

$732

IslipSeattle

ISP - SEA

ISPSEA

Islip Long Island

Wed 10/1

5:30 am-3:05 pm

2 stops12h 35m

Seattle/Tacoma Intl

Sat 10/18

6:15 pm-12:10 pm

2 stops14h 55m

$737

IslipSeattle

ISP - SEA

ISPSEA

Islip Long Island

Wed 10/1

7:30 am-11:15 pm

3 stops18h 45m

Seattle/Tacoma Intl

Sat 10/18

7:37 pm-7:45 pm

2 stops21h 08m

$925

IslipSeattle

ISP - SEA

ISPSEA

Islip Long Island

Thu 10/2

4:33 pm-10:08 pm

1 stop8h 35m

Seattle/Tacoma Intl

Sat 10/11

11:15 pm-10:58 am

1 stop8h 43m

$934

IslipSeattle

ISP - SEA

ISPSEA

Islip Long Island

Wed 10/1

4:33 pm-10:08 pm

1 stop8h 35m

Seattle/Tacoma Intl

Sat 10/18

11:15 pm-4:15 pm

1 stop14h 00m

$944

IslipSeattle

ISP - SEA

ISPSEA

Islip Long Island

Fri 10/3

4:33 pm-10:08 pm

1 stop8h 35m

Seattle/Tacoma Intl

Sun 10/5

11:15 pm-10:58 am

1 stop8h 43m

$980

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Islip to State of Washington

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

Can stopping save me money on Islip to State of Washington flights?

You could potentially save up to 6% on your flight if you consider stops on a Islip to State of Washington flight.

Cheap Islip to State of Washington flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Islip to State of Washington

Direct flights	None

There are no direct flights from Islip to State of Washington. There are no popular flight routes from Islip to State of Washington.

Search flight deals

When did momondo last update prices for flights from Islip Long Island Airport to Washington?
Prices for flights from Islip Long Island Airport to Washington were last updated today.
How many operators does momondo search for flights from Islip Long Island Airport to Washington?
As of September 2025, there is 1 operator available to choose from for flights from Islip Long Island Airport to Washington.
How old do you have to be to fly from Islip Long Island Airport to Washington?
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 Washington.
What documentation or ID do you need to fly to Washington?
The travel and health documents required for your trip to Washington can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Washington. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Islip to State of Washington

Compare and see reviews for airlines that fly from Islip to State of Washington with momondo

Airline	Rating	Free Cancellation	Price
Southwest	PriceFrom $356	Free Cancellation	Rating 8.0 4,244 reviews		Search Southwest flights

Why use momondo?

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

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

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

Flights from Islip to Washington with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

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 Washington from Islip.

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

Yes. momondo can track prices for Islip to Washington 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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Popular cities in Washington

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Cheap flights from Islip to Washington from $267

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Islip to Washington departing on 10/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

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Price Alerts

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Frontier flights from Islip to State of Washington

Our best Frontier deals on Islip to State of Washington flight tickets

Southwest flights from Islip to State of Washington

Our best Southwest deals on Islip to State of Washington flight tickets

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How to get the cheapest flight ticket from Islip to State of Washington

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

Can stopping save me money on Islip to State of Washington flights?

You could potentially save up to 6% on your flight if you consider stops on a Islip to State of Washington flight.

What airlines fly to State of Washington?

Cheap Islip to State of Washington flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Islip to State of Washington

Direct flights

When did momondo last update prices for flights from Islip Long Island Airport to Washington?

How many operators does momondo search for flights from Islip Long Island Airport to Washington?

How old do you have to be to fly from Islip Long Island Airport to Washington?

What documentation or ID do you need to fly to Washington?

Best airlines flying from Islip to State of Washington

Compare and see reviews for airlines that fly from Islip to State of Washington with momondo

Why use momondo?

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

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

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

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

An easier way to manage your State of Washington trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Washington

Popular cities in Washington

Popular flights according to clicks in the last 7 days on momondo