ISP - IAD

Find cheap flights from Islip to Washington Dulles Airport - Compare and Save

1 adult
1 adult, Economy, 0 bags

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Flight Deals

Cheap Flights from Islip to Dulles Intl (ISP-IAD)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Islip to Dulles Intl

Multiple Airlines Logo
ISP  Islip Long Island-IAD Washington Dulles Airport
263 mimulti-stop
Multiple Airlines Logo
IAD  Washington Dulles Airport-ISP Islip Long Island
263 mimulti-stop
Multiple Airlines
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When to book flights from Islip to Dulles Intl

Are your dates flexible? Find out the best times to travel from Islip to Dulles Intl based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your Islip to Washington, D.C. Dulles Intl Airport flight questions, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines and booking questions.

  • Which airports can I use when flying from Islip to Washington, D.C. Dulles Intl Airport?

    Flights from Islip to Washington, D.C. Dulles Intl Airport usually depart from Islip Long Island (ISP) and arrive at Washington, D.C. Dulles Intl (IAD).

  • Can I save money by using flexible dates for flights from Islip to Washington, D.C. Dulles Intl Airport?

    Yes. Being flexible with your travel dates can save you up to 48% on the Islip to Washington, D.C. Dulles Intl Airport route. Friday is the cheapest departure day at $320 round-trip on average, while Monday is the most expensive at $606, a difference of $286. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • What popular places can I visit in Washington, D.C. Dulles Intl Airport?

    Some of the most popular sights in Washington, D.C. Dulles Intl Airport are Walter E. Washington Convention Center, National Mall and Capital One Arena. These are among the most viewed places in Washington, D.C. Dulles Intl Airport on KAYAK.

  • Do I need a passport to fly from Islip to Washington, D.C. Dulles Intl Airport?

    No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID, or another TSA-accepted form of identification.

  • What car rental options are available at Washington, D.C. Dulles Intl Airport (IAD)?

    Washington, D.C. Dulles Intl Airport (IAD) hosts 5 major car rental companies, with daily rates starting from around $24 for economy cars. Top options include:
    · Dollar
    · Budget
    · Hertz
    · Sixt
    · Thrifty

  • How much should I expect to pay for a Islip to Washington, D.C. Dulles Intl Airport flight?

    Round-trip flights from Islip to Washington, D.C. Dulles Intl Airport range from $320 to $606, with an average of $606 over the past 12 months. Anything below $320 counts as a good deal.

Your guide to booking Islip to Washington, D.C. Dulles Intl Airport flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates can be flexible, aim for a Friday departure instead of Monday. On this route, Friday flights average $320 - about $286 less than Monday (47% savings) based on the last 12 months.

Everything you need to know for your flight from Islip to Dulles Intl

Information on your arrival and departure airports

Islip (ISP)
Dulles Intl (IAD)