What is the cheapest airline that flies from Islip Long Island to Washington?

Southwest is the most popular carrier operating from Islip Long Island to Washington

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, New York according to our data. Alaska Airlines is the first choice among our users, with 52% of people opting to fly with this airline when traveling to State of Washington. Keep in mind that there are 9 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 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.

$182 Cheap Flights from Islip, New York to Washington in 2026

Find the cheapest flights from Islip, New York to Washington

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

5:30 am - 12:30 pm

ISP

PDX

10h 00m

1 stop

10:45 pm - 10:15 am

PDX

ISP

8h 30m

1 stop

$332Southwest

Sat, Sep 12 - Tue, Sep 15

11:55 am - 9:15 pm

ISP

PDX

12h 20m

2 stops

10:45 pm - 10:15 am

PDX

ISP

8h 30m

1 stop

$337Southwest

Sat, Sep 12 - Tue, Sep 15

5:30 am - 4:20 pm

ISP

PDX

13h 50m

2 stops

11:30 pm - 12:10 pm

PDX

ISP

9h 40m

2 stops

$342Southwest

Sat, Sep 12 - Tue, Sep 15

11:55 am - 10:55 pm

ISP

SEA

14h 00m

2 stops

10:30 pm - 2:30 pm

SEA

ISP

13h 00m

1 stop

$405Southwest

Sat, Aug 22 - Fri, Aug 28

11:55 am - 10:55 pm

ISP

SEA

14h 00m

2 stops

11:05 pm - 2:30 pm

SEA

ISP

12h 25m

2 stops

$410Southwest

Sat, Aug 22 - Fri, Aug 28

5:30 am - 10:45 am

ISP

SEA

8h 15m

1 stop

10:30 pm - 2:30 pm

SEA

ISP

13h 00m

1 stop

$452Southwest

Sat, Aug 22 - Fri, Aug 28

10:20 am - 5:35 pm

ISP

SEA

10h 15m

2 stops

11:05 pm - 2:30 pm

SEA

ISP

12h 25m

2 stops

$467Southwest

Fri, Sep 4 - Fri, Sep 11

12:35 pm - 9:10 pm

ISP

PDX

11h 35m

2 stops

10:45 pm - 9:40 am

PDX

ISP

7h 55m

1 stop

$472Southwest

Thu, Aug 13 - Sun, Aug 16

3:20 pm - 11:25 pm

ISP

SEA

11h 05m

2 stops

10:30 pm - 9:40 am

SEA

ISP

8h 10m

1 stop

$476Southwest

Tue, Sep 1 - Thu, Sep 3

4:35 pm - 12:50 am

ISP

SEA

11h 15m

2 stops

11:00 pm - 12:35 pm

SEA

ISP

10h 35m

2 stops

$477Southwest

Sun, Aug 23 - Sun, Aug 30

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Southwest flights from Islip, New York to State of Washington

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

Southwest

Sep 12

ISP5:30 amIslip Long Island

10h 00m

1 stop

PDX12:30 pmPortland

Sep 15

PDX10:45 pmPortland

8h 30m

1 stop

ISP10:15 amIslip Long Island

$332

Southwest

Sep 12

ISP11:55 amIslip Long Island

12h 20m

2 stops

PDX9:15 pmPortland

Sep 15

PDX10:45 pmPortland

8h 30m

1 stop

ISP10:15 amIslip Long Island

$337

Southwest

Sep 12

ISP5:30 amIslip Long Island

13h 50m

2 stops

PDX4:20 pmPortland

Sep 15

PDX11:30 pmPortland

9h 40m

2 stops

ISP12:10 pmIslip Long Island

$342

momondo Fare Finder

Use the filters below to find and compare flights from Islip, New York to Washington that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

IslipPortland

ISP - PDX

ISPPDX

Islip Long Island

Sat 9/12

5:30 am-12:30 pm

1 stop10h 00m

Portland

Tue 9/15

10:45 pm-10:15 am

1 stop8h 30m

$332

IslipPortland

ISP - PDX

ISPPDX

Islip Long Island

Sat 9/12

11:55 am-9:15 pm

2 stops12h 20m

Portland

Tue 9/15

10:45 pm-10:15 am

1 stop8h 30m

$337

IslipPortland

ISP - PDX

ISPPDX

Islip Long Island

Sat 9/12

5:30 am-4:20 pm

2 stops13h 50m

Portland

Tue 9/15

11:30 pm-12:10 pm

2 stops9h 40m

$342

IslipSeattle

ISP - SEA

ISPSEA

Islip Long Island

Sat 8/22

11:55 am-10:55 pm

2 stops14h 00m

Seattle/Tacoma Intl

Fri 8/28

10:30 pm-2:30 pm

1 stop13h 00m

$405

IslipSeattle

ISP - SEA

ISPSEA

Islip Long Island

Sat 8/22

11:55 am-10:55 pm

2 stops14h 00m

Seattle/Tacoma Intl

Fri 8/28

11:05 pm-2:30 pm

2 stops12h 25m

$410

IslipSeattle

ISP - SEA

ISPSEA

Islip Long Island

Sat 8/22

5:30 am-10:45 am

1 stop8h 15m

Seattle/Tacoma Intl

Fri 8/28

10:30 pm-2:30 pm

1 stop13h 00m

$452

IslipSeattle

ISP - SEA

ISPSEA

Islip Long Island

Fri 9/4

10:20 am-5:35 pm

2 stops10h 15m

Seattle/Tacoma Intl

Fri 9/11

11:05 pm-2:30 pm

2 stops12h 25m

$467

IslipPortland

ISP - PDX

ISPPDX

Islip Long Island

Thu 8/13

12:35 pm-9:10 pm

2 stops11h 35m

Portland

Sun 8/16

10:45 pm-9:40 am

1 stop7h 55m

$472

IslipSeattle

ISP - SEA

ISPSEA

Islip Long Island

Tue 9/1

3:20 pm-11:25 pm

2 stops11h 05m

Seattle/Tacoma Intl

Thu 9/3

10:30 pm-9:40 am

1 stop8h 10m

$476

IslipSeattle

ISP - SEA

ISPSEA

Islip Long Island

Sun 8/23

4:35 pm-12:50 am

2 stops11h 15m

Seattle/Tacoma Intl

Sun 8/30

11:00 pm-12:35 pm

2 stops10h 35m

$477

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, New York 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, New York to State of Washington flights?

You could potentially save up to 29% on your flight if you consider stops on a Islip, New York to State of Washington flight.

Cheap Islip, New York to State of Washington flight deals and tips

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

Fastest flight time	9h 15m
Direct flights	None

The fastest flight from Islip, New York to State of Washington takes 9h 15m

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

Search flight deals

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

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 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.

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.