ISP - SEA

$364 Find Cheap Flights from Islip to Seattle

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 Seattle departing on 10/23. 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

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

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

Cheap Flights from Islip to Seattle (ISP-SEA)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Islip to Seattle 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 Seattle

Thu, Oct 23 - Sun, Oct 26
Southwest Logo
12:45 pm - 12:25 amISP-SEA
14h 40m2 stops
Southwest Logo
7:25 pm - 12:00 pmSEA-ISP
13h 35m2 stops
$364Southwest
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Thu, Aug 7 - Mon, Aug 11
Southwest Logo
3:05 pm - 12:05 amISP-SEA
12h 00m2 stops
Southwest Logo
11:10 pm - 3:10 pmSEA-ISP
13h 00m2 stops
$381Southwest
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Tue, Aug 5 - Fri, Aug 8
Southwest Logo
6:05 am - 11:15 amISP-SEA
8h 10m1 stop
Southwest Logo
11:10 pm - 2:55 pmSEA-ISP
12h 45m2 stops
$432Southwest
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Thu, Jul 31 - Sun, Aug 3
Southwest Logo
10:00 am - 6:45 pmISP-SEA
11h 45m2 stops
Southwest Logo
10:40 pm - 11:55 amSEA-ISP
10h 15m2 stops
$437Southwest
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Thu, Aug 7 - Mon, Aug 11
Southwest Logo
3:05 pm - 12:05 amISP-SEA
12h 00m2 stops
Southwest Logo
9:10 pm - 11:55 amSEA-ISP
11h 45m1 stop
$438Southwest
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Thu, Jul 31 - Sun, Aug 3
Southwest Logo
10:00 am - 6:45 pmISP-SEA
11h 45m2 stops
Southwest Logo
9:10 pm - 9:25 amSEA-ISP
9h 15m1 stop
$582Southwest
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Thu, Aug 7 - Mon, Aug 11
Southwest Logo
12:10 pm - 9:30 pmISP-SEA
12h 20m1 stop
Southwest Logo
9:10 pm - 11:55 amSEA-ISP
11h 45m1 stop
$618Southwest
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Tue, Aug 12 - Sun, Aug 17
Frontier Logo
8:00 am - 11:42 pmISP-SEA
18h 42m2 stops
Frontier Logo
7:48 pm - 7:52 pmSEA-ISP
21h 04m2 stops
$633Frontier
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Tue, Aug 12 - Sun, Aug 17
Frontier Logo
8:00 am - 11:42 pmISP-SEA
18h 42m2 stops
Frontier Logo
7:48 pm - 7:52 pmSEA-ISP
21h 04m2 stops
$650Frontier
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Thu, Oct 23 - Sun, Oct 26
Logo
11:53 am - 7:46 pmISP-SEA
10h 53m1 stop
Logo
6:38 pm - 10:37 amSEA-ISP
12h 59m2 stops
$689
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KAYAK's insights & trends for Islip to Seattle flights

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

Which airlines provide the cheapest flights from Islip to Seattle?

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 Seattle were found on Southwest ($364) and Frontier ($633).

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Good to know

Cheapest flight$364
Flight from Islip to Seattle

When to book flights from Islip to Seattle

Are your dates flexible? Find out the best times to travel from Islip to Seattle based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Islip to Seattle

  • What is the cheapest flight from Islip to Seattle?

    In the last 3 days, the lowest price for a flight from Islip to Seattle was $364 for a round-trip ticket.

  • Do I need a passport to fly between Islip and Seattle?

    A passport is not required to fly from Islip to Seattle.

  • Which airports will I be using when flying from Islip to Seattle?

    Islip airport is called Islip Long Island and the only airport in Seattle is Seattle/Tacoma Intl.

  • Which aircraft models fly most regularly from Islip to Seattle?

    We unfortunately don’t have that data for this specific route.

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

    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 Seattle.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Islip 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 Seattle?

    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 to Seattle with an airline and back to Islip with another airline. Booking your flights between Islip and SEA can sometimes prove cheaper using this method.

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

    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 to Seattle from Islip up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

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

Information on your arrival and departure airports

Islip (ISP)
Seattle (SEA)

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