$100 Cheap flights from Washington Dulles Intl. to MacArthur (IAD to ISP)

Discover our best flights from Washington IAD to Islip ISP. 

With 20 airlines to choose from on Travelocity, you can easily find the best option for you. Use our filters to sort by price, compare airlines, and find the most convenient flight times. 

Find our best return flights from Washington IAD to Islip ISP at the right price  

Airfares to Islip ISP from Washington IAD currently cost between $244 and $349. It’s usually cheaper to book a round trip than two separate one-way flights. Prices and availability subject to change. Additional terms may apply. 

Book one-way flights from Washington IAD to Islip ISP 

If you want to be flexible about when you return, or keep your travel options open ended, a one-way flight could be just the ticket! You’ll find one-way airfares from Washington IAD to Islip ISP on Travelocity starting at $100. Prices and availability subject to change. Additional terms may apply. 

Get to Islip ISP from Washington IAD quicker with direct flights. 

Get to Islip faster, without the hassle of changing planes and moving baggage, by booking a direct flight. Expect your direct flight to ISP from IAD to take around hour(s) min(s).  

Find our cheapest airfares for flights from Washington IAD to Islip ISP

Find cheap flight deals by using our search filters to sort results starting with the lowest price airfares to ISP from IAD. Our Price Match Promise means if you find a lower rate on Travelocity.com or on another US-based website within 24 hours of booking, we’ll credit or refund the difference.  

Get our best airfare deals for your flight from Washington IAD to Islip ISP today 

If you’re flexible about when you travel, August is usually the cheapest month to fly from Washington IAD to Islip ISP. If you need to be more specific, search by date and arrival and departure times.Then, compare prices across different airlines, and sort results by lowest price first. 

Book flexible airline tickets for flights to Islip ISP from Washington IAD 

Some airlines let you change your travel dates without charging a fee. Use our ‘no change fee’ filter to see which flights to ISP from IAD have this option.  

Travel with confidence when you book flights to Islip ISP from Washington IAD with Travelocity 

We’ve secured fantastic deals with all the main airline carriers and it’s easy to compare, choose, and book with Travelocity. With 24/7 customer service and our free 'App', we’ll always keep you moving.