$105 Find Cheap Flights from Washington Dulles Airport to Islip - Compare and Save

In the last 5 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to Islip was $105 for a one-way ticket and $229 for a round-trip.

A passport is not required to fly from Washington Dulles Airport to Islip.

When flying out of Washington Dulles Airport you will be using Washington, D.C. Dulles Intl. You will be landing at Islip, also known as Islip Long Island.

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 Washington Dulles Airport to Islip.

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Islip from Washington Dulles Airport 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 Washington Dulles Airport with another airline. Booking your flights between Washington Dulles Airport 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 Washington Dulles Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.