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 July 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.

$368 Cheap Flights from Islip to Washington in 2025

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Find the cheapest flights from Islip, New York to Washington

Round-trip

One-way

Last minute

Cheap round-trip flights

3:05 pm - 9:30 pmISP-SEA

9h 25m1 stop

8:10 am - 9:40 pmSEA-ISP

10h 30m2 stops

$368Southwest

Find Deal

Fri, Aug 29 - Sat, Sep 6

11:25 am - 9:30 pmISP-SEA

13h 05m2 stops

5:45 am - 8:40 pmSEA-ISP

11h 55m2 stops

$373Southwest

Find Deal

Fri, Oct 31 - Sat, Nov 8

11:40 am - 9:20 pmISP-PDX

12h 40m2 stops

5:10 am - 10:05 pmPDX-ISP

13h 55m2 stops

$373Southwest

Find Deal

Wed, Oct 22 - Wed, Oct 29

12:10 pm - 8:50 pmISP-PDX

11h 40m2 stops

6:10 am - 9:05 pmPDX-ISP

11h 55m2 stops

$386Southwest

Find Deal

Thu, Sep 11 - Tue, Sep 16

6:00 am - 4:00 pmISP-PDX

13h 00m1 stop

9:05 pm - 11:55 amPDX-ISP

11h 50m1 stop

$387Southwest

Find Deal

Thu, Sep 11 - Tue, Sep 16

3:05 pm - 9:30 pmISP-SEA

9h 25m1 stop

9:10 pm - 12:30 pmSEA-ISP

12h 20m1 stop

$398Southwest

Find Deal

Fri, Aug 29 - Sat, Sep 6

3:05 pm - 12:05 amISP-SEA

12h 00m2 stops

7:35 am - 9:40 pmSEA-ISP

11h 05m2 stops

$400Southwest

Find Deal

Fri, Aug 29 - Sat, Sep 6

5:30 am - 3:00 pmISP-SEA

12h 30m2 stops

6:05 am - 9:10 pmSEA-ISP

12h 05m2 stops

$403Southwest

Find Deal

Fri, Oct 24 - Fri, Oct 31

8:00 am - 11:02 pmISP-SEA

18h 02m2 stops

11:05 pm - 11:41 pmSEA-ISP

21h 36m1 stop

$766

Find Deal

Tue, Aug 12 - Tue, Aug 19

2:19 pm - 7:04 pmISP-PDX

31h 45m3 stops

12:07 pm - 7:41 pmPDX-ISP

28h 34m3 stops

$777

Find Deal

Thu, Sep 11 - Tue, Sep 16

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

Aug 29

ISP3:05 pmIslip Long Island

9h 25m

1 stop

SEA9:30 pmSeattle/Tacoma Intl

Sep 6

SEA8:10 amSeattle/Tacoma Intl

10h 30m

2 stops

ISP9:40 pmIslip Long Island

$368

Find similar

Southwest

Oct 31

ISP11:25 amIslip Long Island

13h 05m

2 stops

SEA9:30 pmSeattle/Tacoma Intl

Nov 8

SEA5:45 amSeattle/Tacoma Intl

11h 55m

2 stops

ISP8:40 pmIslip Long Island

$373

Find similar

Southwest

Sep 11

ISP12:10 pmIslip Long Island

11h 40m

2 stops

PDX8:50 pmPortland

Sep 16

PDX6:10 amPortland

11h 55m

2 stops

ISP9:05 pmIslip Long Island

$386

Find similar

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

IslipSeattle

ISP - SEA

ISPSEA

Islip Long Island

Fri 8/29

3:05 pm-9:30 pm

1 stop9h 25m

Seattle/Tacoma Intl

Sat 9/6

8:10 am-9:40 pm

2 stops10h 30m

$368

IslipSeattle

ISP - SEA

ISPSEA

Islip Long Island

Fri 10/31

11:25 am-9:30 pm

2 stops13h 05m

Seattle/Tacoma Intl

Sat 11/8

5:45 am-8:40 pm

2 stops11h 55m

$373

IslipPortland

ISP - PDX

ISPPDX

Islip Long Island

Wed 10/22

11:40 am-9:20 pm

2 stops12h 40m

Portland

Wed 10/29

5:10 am-10:05 pm

2 stops13h 55m

$373

IslipPortland

ISP - PDX

ISPPDX

Islip Long Island

Thu 9/11

12:10 pm-8:50 pm

2 stops11h 40m

Portland

Tue 9/16

6:10 am-9:05 pm

2 stops11h 55m

$386

IslipPortland

ISP - PDX

ISPPDX

Islip Long Island

Thu 9/11

6:00 am-4:00 pm

1 stop13h 00m

Portland

Tue 9/16

9:05 pm-11:55 am

1 stop11h 50m

$387

IslipSeattle

ISP - SEA

ISPSEA

Islip Long Island

Fri 8/29

3:05 pm-9:30 pm

1 stop9h 25m

Seattle/Tacoma Intl

Sat 9/6

9:10 pm-12:30 pm

1 stop12h 20m

$398

IslipSeattle

ISP - SEA

ISPSEA

Islip Long Island

Fri 8/29

3:05 pm-12:05 am

2 stops12h 00m

Seattle/Tacoma Intl

Sat 9/6

7:35 am-9:40 pm

2 stops11h 05m

$400

IslipSeattle

ISP - SEA

ISPSEA

Islip Long Island

Fri 10/24

5:30 am-3:00 pm

2 stops12h 30m

Seattle/Tacoma Intl

Fri 10/31

6:05 am-9:10 pm

2 stops12h 05m

$403

IslipSeattle

ISP - SEA

ISPSEA

Islip Long Island

Tue 8/12

8:00 am-11:02 pm

2 stops18h 02m

Seattle/Tacoma Intl

Tue 8/19

11:05 pm-11:41 pm

1 stop21h 36m

$766

IslipPortland

ISP - PDX

ISPPDX

Islip Long Island

Thu 9/11

2:19 pm-7:04 pm

3 stops31h 45m

Portland

Tue 9/16

12:07 pm-7:41 pm

3 stops28h 34m

$777

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 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

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 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.

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

Best Price Found	$643
Fastest flight time	9h 15m
Direct flights	None
Airports in State of Washington	2 airports

The best one-way flight to State of Washington from Islip, New York in the past 72 hours is $643. The best round-trip flight deal from Islip, New York to State of Washington found on momondo in the last 72 hours is $368.

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. Popular non-direct routes for this connection are Islip Long Island Airport - Portland Airport and Islip Long Island Airport - Seattle/Tacoma Intl Airport.

There are 2 airports near State of Washington: Portland (PDX), Seattle/Tacoma Intl (SEA)

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 July 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, New York to State of Washington

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

Airline	Rating	Free Cancellation	Price
Southwest	PriceFrom $356	Free Cancellation	Rating 8.0 4,246 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.

An easier way to manage your State of Washington trip

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Find better results for your trip to Washington

Popular cities in Washington

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Cheap flights from Islip, New York to Washington from $368

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, New York to Washington departing on 8/29. 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

Price Alerts

Price Alerts

Find the cheapest flights from Islip, New York to Washington

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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

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

See travel insights to Washington from

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

What airlines fly to State of Washington?

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

Best Price Found

Fastest flight time

Direct flights

Airports in State of Washington

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, New York to State of Washington

Compare and see reviews for airlines that fly from Islip, New York 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