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

Frontier and Southwest are the most popular carriers 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 51% of people opting to fly with this airline when traveling to State of Washington. Keep in mind that there are 8 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.

$199 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.

3:10 pm - 12:10 amISP Islip Long Island-PDX Portland

12h 00m2 stops Baltimore/Washington Chicago Midway

11:35 pm - 2:30 pmPDX Portland-ISP Islip Long Island

11h 55m2 stops Chicago Midway Baltimore/Washington

$317Southwest

Mon, Oct 19 - Wed, Oct 21

10:57 am - 12:52 pmISP Islip Long Island-PDX Portland

28h 55m2 stops Orlando Las Vegas Harry Reid Intl

5:56 pm - 6:14 pmPDX Portland-ISP Islip Long Island

21h 18m2 stops Denver Intl Orlando

$368Frontier

Wed, Aug 26 - Wed, Sep 2

12:55 pm - 8:45 pmISP Islip Long Island-PDX Portland

10h 50m2 stops Baltimore/Washington San Jose

10:45 pm - 9:40 amPDX Portland-ISP Islip Long Island

7h 55m1 stop Baltimore/Washington

$397Southwest

Wed, Sep 23 - Sun, Sep 27

5:40 am - 5:10 pmISP Islip Long Island-SEA Seattle/Tacoma Intl

14h 30m2 stops Baltimore/Washington San Jose

12:10 am - 11:55 amSEA Seattle/Tacoma Intl-ISP Islip Long Island

8h 45m2 stops Chicago Midway Baltimore/Washington

$402Southwest

Sun, Oct 18 - Fri, Oct 23

3:20 pm - 11:15 pmISP Islip Long Island-PDX Portland

10h 55m2 stops Baltimore/Washington Chicago Midway

11:30 pm - 12:35 pmPDX Portland-ISP Islip Long Island

10h 05m2 stops Chicago Midway Baltimore/Washington

$402Southwest

Wed, Sep 23 - Sun, Sep 27

12:20 pm - 6:40 pmISP Islip Long Island-SEA Seattle/Tacoma Intl

9h 20m1 stop Baltimore/Washington

11:05 pm - 12:10 pmSEA Seattle/Tacoma Intl-ISP Islip Long Island

10h 05m2 stops Chicago Midway Baltimore/Washington

$433Southwest

Sun, Sep 6 - Tue, Sep 15

4:15 pm - 11:05 pmISP Islip Long Island-SEA Seattle/Tacoma Intl

9h 50m2 stops Baltimore/Washington Chicago Midway

11:05 pm - 12:10 pmSEA Seattle/Tacoma Intl-ISP Islip Long Island

10h 05m2 stops Chicago Midway Baltimore/Washington

$438Southwest

Sun, Sep 6 - Tue, Sep 15

6:05 am - 10:40 amISP Islip Long Island-PDX Portland

7h 35m1 stop Baltimore/Washington

10:45 pm - 9:40 amPDX Portland-ISP Islip Long Island

7h 55m1 stop Baltimore/Washington

$473Southwest

Wed, Aug 26 - Wed, Sep 2

6:05 am - 1:00 pmISP Islip Long Island-SEA Seattle/Tacoma Intl

9h 55m1 stop Baltimore/Washington

10:30 pm - 9:40 amSEA Seattle/Tacoma Intl-ISP Islip Long Island

8h 10m1 stop Baltimore/Washington

$477Southwest

Wed, Sep 16 - Wed, Sep 23

6:05 am - 10:40 amISP Islip Long Island-PDX Portland

7h 35m1 stop Baltimore/Washington

10:45 pm - 9:40 amPDX Portland-ISP Islip Long Island

7h 55m1 stop Baltimore/Washington

$477Southwest

Wed, Sep 23 - Sun, Sep 27

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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

Oct 19

ISP3:10 pmIslip Long Island

12h 00m

2 stops

PDX12:10 amPortland

Oct 21

PDX11:35 pmPortland

11h 55m

2 stops

ISP2:30 pmIslip Long Island

$317

Southwest

Sep 23

ISP12:55 pmIslip Long Island

10h 50m

2 stops

PDX8:45 pmPortland

Sep 27

PDX10:45 pmPortland

7h 55m

1 stop

ISP9:40 amIslip Long Island

$397

Southwest

Oct 18

ISP5:40 amIslip Long Island

14h 30m

2 stops

SEA5:10 pmSeattle/Tacoma Intl

Oct 23

SEA12:10 amSeattle/Tacoma Intl

8h 45m

2 stops

ISP11:55 amIslip Long Island

$402

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

IslipPortland

ISP Islip Long Island - PDX Portland

ISPPDX

Islip Long Island

Mon 10/19

3:10 pm-12:10 am

2 stops12h 00m

Portland

Wed 10/21

11:35 pm-2:30 pm

2 stops11h 55m

$317

IslipPortland

ISP Islip Long Island - PDX Portland

ISPPDX

Islip Long Island

Wed 8/26

10:57 am-12:52 pm

2 stops28h 55m

Portland

Wed 9/2

5:56 pm-6:14 pm

2 stops21h 18m

$368

IslipPortland

ISP Islip Long Island - PDX Portland

ISPPDX

Islip Long Island

Wed 9/23

12:55 pm-8:45 pm

2 stops10h 50m

Portland

Sun 9/27

10:45 pm-9:40 am

1 stop7h 55m

$397

IslipSeattle

ISP Islip Long Island - SEA Seattle/Tacoma Intl

ISPSEA

Islip Long Island

Sun 10/18

5:40 am-5:10 pm

2 stops14h 30m

Seattle/Tacoma Intl

Fri 10/23

12:10 am-11:55 am

2 stops8h 45m

$402

IslipPortland

ISP Islip Long Island - PDX Portland

ISPPDX

Islip Long Island

Wed 9/23

3:20 pm-11:15 pm

2 stops10h 55m

Portland

Sun 9/27

11:30 pm-12:35 pm

2 stops10h 05m

$402

IslipSeattle

ISP Islip Long Island - SEA Seattle/Tacoma Intl

ISPSEA

Islip Long Island

Sun 9/6

12:20 pm-6:40 pm

1 stop9h 20m

Seattle/Tacoma Intl

Tue 9/15

11:05 pm-12:10 pm

2 stops10h 05m

$433

IslipSeattle

ISP Islip Long Island - SEA Seattle/Tacoma Intl

ISPSEA

Islip Long Island

Sun 9/6

4:15 pm-11:05 pm

2 stops9h 50m

Seattle/Tacoma Intl

Tue 9/15

11:05 pm-12:10 pm

2 stops10h 05m

$438

Quickest round-trip

IslipPortland

ISP Islip Long Island - PDX Portland

ISPPDX

Islip Long Island

Wed 8/26

6:05 am-10:40 am

1 stop7h 35m

Portland

Wed 9/2

10:45 pm-9:40 am

1 stop7h 55m

$473

IslipSeattle

ISP Islip Long Island - SEA Seattle/Tacoma Intl

ISPSEA

Islip Long Island

Wed 9/16

6:05 am-1:00 pm

1 stop9h 55m

Seattle/Tacoma Intl

Wed 9/23

10:30 pm-9:40 am

1 stop8h 10m

$477

IslipPortland

ISP Islip Long Island - PDX Portland

ISPPDX

Islip Long Island

Wed 9/23

6:05 am-10:40 am

1 stop7h 35m

Portland

Sun 9/27

10:45 pm-9:40 am

1 stop7h 55m

$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 25% 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	7h 40m
Direct flights	None

The fastest flight from Islip, New York to State of Washington takes 7h 40m

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.