$369 Find Cheap Flights from Seattle to Islip - Compare and Save

In the last 5 days, the lowest price for a flight from Seattle to Islip was $494 for a one-way ticket and $369 for a round-trip.

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

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

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 Seattle to Islip.

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

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

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