IAD - ISP

$90 Find Cheap Flights from Washington Dulles Airport to Islip

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Dulles Intl to Islip departing on 6/28. 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 Islip

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

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

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

Fri, Jul 11 - Fri, Jul 18
Frontier Logo
6:07 pm - 1:04 pmIAD-ISP
18h 57m1 stop
Frontier Logo
8:37 pm - 12:52 pmISP-IAD
16h 15m1 stop
$266Frontier
Find Deal
Sun, Jul 6 - Wed, Jul 9
Frontier Logo
6:06 pm - 1:04 pmIAD-ISP
18h 58m1 stop
Frontier Logo
8:37 pm - 12:51 pmISP-IAD
16h 14m1 stop
$319Frontier
Find Deal
Fri, Jul 4 - Fri, Jul 11
Frontier Logo
1:29 pm - 7:36 pmIAD-ISP
6h 07m1 stop
Frontier Logo
8:37 pm - 12:51 pmISP-IAD
16h 14m1 stop
$329Frontier
Find Deal
Sat, Sep 13 - Sat, Sep 20
Frontier Logo
8:06 pm - 10:37 amIAD-ISP
14h 31m1 stop
Frontier Logo
5:07 pm - 8:43 pmISP-IAD
27h 36m1 stop
$381Frontier
Find Deal
Fri, Jul 18 - Fri, Jul 25
Frontier Logo
6:07 pm - 1:04 pmIAD-ISP
18h 57m1 stop
Frontier Logo
8:37 pm - 12:52 pmISP-IAD
16h 15m1 stop
$402Frontier
Find Deal
Thu, Jul 31 - Thu, Aug 7
Frontier Logo
1:29 pm - 11:47 pmIAD-ISP
10h 18m1 stop
Frontier Logo
6:00 am - 12:44 pmISP-IAD
6h 44m1 stop
$415Frontier
Find Deal
Thu, Jul 17 - Thu, Jul 24
Frontier Logo
6:06 pm - 1:04 pmIAD-ISP
18h 58m1 stop
Frontier Logo
2:05 pm - 5:17 pmISP-IAD
27h 12m1 stop
$425Frontier
Find Deal
Sat, Jun 28 - Sun, Jun 29
Frontier Logo
1:29 pm - 7:36 pmIAD-ISP
6h 07m1 stop
Frontier Logo
8:21 pm - 12:44 pmISP-IAD
16h 23m1 stop
$441Frontier
Find Deal
Fri, Jul 4 - Sun, Jul 6
Logo
1:29 pm - 7:36 pmIAD-ISP
6h 07m1 stop
Logo
7:49 pm - 8:05 amISP-IAD
12h 16m1 stop
$591
Find Deal
Sun, Sep 21 - Mon, Sep 29
Logo
10:20 pm - 3:21 pmIAD-ISP
17h 01m1 stop
Logo
2:19 pm - 7:11 amISP-IAD
16h 52m1 stop
$699
Find Deal
Useful Info

Good to know

Cheapest flight$90
Flight from Washington Dulles Airport to Islip

When to book flights from Dulles Intl to Islip

Are your dates flexible? Find out the best times to travel from Dulles Intl to Islip 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 Washington Dulles Airport to Islip flights

  • What is the cheapest flight from Washington, D.C. Dulles Intl Airport to Islip?

    In the last 3 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to Islip was $90 for a one-way ticket and $266 for a round-trip.

  • Do I need a passport to fly between Washington Dulles Airport and Islip?

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

  • Which airports will I be using when flying 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.

  • Which aircraft models fly most regularly from Washington Dulles Airport to Islip?

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

  • How does KAYAK find such low prices on flights from Washington Dulles Airport to Islip?

    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.

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

  • What is the Hacker Fare option on flights from Washington Dulles Airport to Islip?

    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.

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

    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.

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

Information on your arrival and departure airports

Washington Dulles Airport (IAD)
Islip (ISP)

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