$485 Find Cheap Flights from Islip to Washington

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Islip to Washington departing on 1/8. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Washington

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Islip to Washington, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Islip to Washington, as well as popular online travel agencies
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Flight Deals

Book Cheap Islip to Washington Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Islip to Washington that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Islip to Washington

Thu, Jan 8 - Sun, Jan 11
Southwest Logo
12:40 pm - 10:05 pm
ISP
-
PDX
12h 25m2 stops
Southwest Logo
8:35 am - 10:20 pm
PDX
-
ISP
10h 45m2 stops
$466Southwest
Mon, Feb 16 - Sun, Feb 22
Southwest Logo
1:10 pm - 12:10 am
ISP
-
SEA
14h 00m2 stops
Southwest Logo
6:25 pm - 11:55 am
SEA
-
ISP
14h 30m2 stops
$485Southwest
Wed, Jan 7 - Mon, Jan 12
Southwest Logo
12:40 pm - 10:30 pm
ISP
-
PDX
12h 50m2 stops
Southwest Logo
6:45 am - 9:55 pm
PDX
-
ISP
12h 10m2 stops
$490Southwest
Wed, Jan 7 - Sun, Jan 11
Southwest Logo
12:40 pm - 10:30 pm
ISP
-
PDX
12h 50m2 stops
Southwest Logo
5:50 am - 10:20 pm
PDX
-
ISP
13h 30m2 stops
$553Southwest
Tue, Dec 30 - Sat, Jan 3
Frontier Logo
12:20 pm - 12:30 pm
ISP
-
SEA
27h 10m2 stops
Frontier Logo
6:12 pm - 7:39 pm
SEA
-
ISP
22h 27m2 stops
$896Frontier
Mon, Feb 16 - Sun, Feb 22
Multiple Airlines Logo
12:30 pm - 10:00 pm
ISP
-
SEA
12h 30m1 stop
Multiple Airlines Logo
7:55 am - 12:53 am
SEA
-
ISP
37h 58m2 stops
$975Multiple Airlines
Mon, Feb 16 - Sun, Feb 22
Multiple Airlines Logo
12:30 pm - 10:00 pm
ISP
-
SEA
12h 30m1 stop
Multiple Airlines Logo
10:40 pm - 11:05 am
SEA
-
ISP
9h 25m1 stop
$979Multiple Airlines
Tue, Dec 30 - Sat, Jan 3
Southwest Logo
1:35 pm - 12:55 am
ISP
-
SEA
14h 20m2 stops
Southwest Logo
6:15 am - 8:50 pm
SEA
-
ISP
11h 35m2 stops
$997Southwest
Wed, Jan 7 - Mon, Jan 12
Multiple Airlines Logo
12:30 pm - 8:48 pm
ISP
-
PDX
11h 18m1 stop
Multiple Airlines Logo
7:00 am - 7:45 pm
PDX
-
ISP
9h 45m1 stop
$1,159Multiple Airlines
Thu, Jan 8 - Sun, Jan 11
Multiple Airlines Logo
9:59 am - 8:48 pm
ISP
-
PDX
13h 49m1 stop
Multiple Airlines Logo
7:00 am - 7:45 pm
PDX
-
ISP
9h 45m1 stop
$1,179Multiple Airlines
Booking Insights

KAYAK's insights & trends for Islip to Washington flights

Get data-powered insights and trends into flights from Islip to Washington to help you find the cheapest flights, the best time to fly and much more.

Which airlines fly non-stop between Islip and Washington?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for round-trip flights from Islip to Washington.

There is just one airline that flies from Islip to Washington direct and that is Southwest. The best round-trip deal found from Southwest for the route is to Seattle (SEA) and costs $356.

Which airlines provide the cheapest flights from Islip to Washington?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Islip to Washington were found on Southwest ($485) and Frontier ($896).

Find deals

Good to know

Cheapest flight$466
Flight from Islip to Portland

FAQs - booking Washington flights

  • How does KAYAK find such low prices on flights from Islip to Washington?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Islip to Washington.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Islip to Washington?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Islip to Washington is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Islip to Washington?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Islip to Washington with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Islip to Washington?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Islip to Washington up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to Washington?

    The cheapest time of day to fly to Washington is generally in the morning, when round-trip flights cost $656 on average. The most expensive time of day to fly to Washington is generally in the morning, which is peak travel time and where the average cost of a ticket is $656.

Reviews of the top airline flying from Islip to Washington

 
See real verified KAYAK customer reviews for airlines flying from Islip to Washington. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Islip to Washington? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
SouthwestOverall score based on 4250 reviews
7.5Entertainment
8.0Comfort
8.1Boarding
8.6Crew
7.0Food
Airline reviews

They sent a notice that they were boarding an hour early. We had to leave the club and run to the gate. They said sorry, that came from corporate and was a mistake. They did not have enough seating because the flight before it had not taken off on time. They moved our gate and delayed it for an hour.

2.0 MediocreRobert, Dec 2025
LAS - TPA
Read more Southwest reviews

They sent a notice that they were boarding an hour early. We had to leave the club and run to the gate. They said sorry, that came from corporate and was a mistake. They did not have enough seating because the flight before it had not taken off on time. They moved our gate and delayed it for an hour.

The boarding and seat assignment system no longer works for me, but I know it is being replaced. Otherwise, I am good with the overall experience.

The lead steward kept singing about "San Francisco" and hotel California---more annoying than humorous....needs work. Flight was smooth and on time.

Still a fan of open seating. Flight was on schedule and arrived on time. The 737 MAX is very comfortable.

Airline travel is always too cramped to really be pleasant, but the cabin crew on this flight did a pretty good job of making up for it by putting on some music during boarding and sprinkling a few funny remarks into the safety briefing and announcements, and just generally being friendly and helpful. It definitely reminded me of why I prefer the in-flight experience on Southwest!

No delays and arrived to destination 30 min early. Staff was super friendly.

San Diego airport is brand new, spacious, airy and very smooth checkin at SW baggage drop.

It was rough. The staff was unprofessional, the choice of on board drinks terrible, it was cramped in space at every airport, they always ran out of overhead bin space so they pressured people to check bags for free or we couldn’t leave on the plane— so I did check my bag to help, and they nearly lost my bag. My bag did not arrive on the luggage belt, another man on my flight and I had to waste our time going to the baggage office to search for our bags. I would only fly southwest again if it was my last choice. Also, my flights were consistently delayed over and over again— at one point they straight up told us we were waiting for the pilot to arrive.

Crew could have been friendlier, maybe I'm spoiled by SW crews. In flight wifi was good. Would be nice to have more food offerings on a 4 plus hour flight

Had to get off plane from prior flight even though I had to reboard same plane to continue to my final destination.

Everything you need to know for your flight from Islip to Washington

Information on your arrival and departure airports

Islip (ISP)