IAD - ISP

$83 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 11/2. 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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Everything you should know

Cheapest round-trip
$238
Frontier
Fri 10/24Sun 10/26
IAD - ISP • 1 stop
Cheapest one-way
$83
Frontier
Sun 11/2
IAD - ISP • 1 stop
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We hope you love your trip to Islip!
Flight Deals
Booking Insights
Flight 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, Oct 24 - Sun, Oct 26
Frontier Logo
9:58 pm - 10:37 amIAD-ISP
12h 39m1 stop
Frontier Logo
9:47 pm - 3:39 pmISP-IAD
17h 52m2 stops
$238Frontier
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Thu, Nov 6 - Sun, Nov 9
Frontier Logo
9:52 pm - 8:54 amIAD-ISP
11h 02m1 stop
Frontier Logo
8:49 am - 12:11 amISP-IAD
15h 22m2 stops
$279Frontier
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Thu, Oct 23 - Sun, Oct 26
Frontier Logo
4:55 pm - 9:04 amIAD-ISP
16h 09m2 stops
Frontier Logo
9:47 pm - 3:39 pmISP-IAD
17h 52m2 stops
$294Frontier
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Thu, Nov 6 - Sun, Nov 9
Frontier Logo
5:34 pm - 8:54 amIAD-ISP
15h 20m2 stops
Frontier Logo
9:27 pm - 4:34 pmISP-IAD
19h 07m2 stops
$297Frontier
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Wed, Nov 26 - Sun, Nov 30
Frontier Logo
5:26 pm - 11:59 pmIAD-ISP
6h 33m1 stop
Frontier Logo
8:25 pm - 7:45 amISP-IAD
11h 20m1 stop
$301Frontier
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Sat, Oct 11 - Mon, Oct 13
Frontier Logo
9:38 pm - 8:52 pmIAD-ISP
23h 14m1 stop
Frontier Logo
4:58 pm - 7:46 pmISP-IAD
26h 48m2 stops
$337Frontier
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Fri, Oct 17 - Sun, Oct 19
Frontier Logo
4:45 pm - 10:37 amIAD-ISP
17h 52m2 stops
Frontier Logo
9:47 pm - 3:39 pmISP-IAD
17h 52m2 stops
$348Frontier
Find Deal
Fri, Oct 31 - Sun, Nov 2
Frontier Logo
5:34 pm - 10:37 amIAD-ISP
17h 03m2 stops
Frontier Logo
8:49 am - 12:11 amISP-IAD
15h 22m2 stops
$349Frontier
Find Deal
Thu, Oct 23 - Sun, Oct 26
Multiple Airlines Logo
2:10 pm - 11:15 amIAD-ISP
21h 05m1 stop
Multiple Airlines Logo
9:47 pm - 9:38 pmISP-IAD
23h 51m1 stop
$408Multiple Airlines
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Thu, Oct 16 - Sun, Oct 19
Multiple Airlines Logo
2:10 pm - 11:15 amIAD-ISP
21h 05m1 stop
Multiple Airlines Logo
9:47 pm - 8:43 pmISP-IAD
22h 56m1 stop
$434Multiple Airlines
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Booking Insights

KAYAK's insights & trends for Dulles Intl to Islip flights

Get data-powered insights and trends into flights from Dulles Intl to Islip to help you find the cheapest flights, the best time to fly and much more.

What is the most popular layover airport when flying from Washington Dulles Airport to Islip?

Percentage of 1-stop round-trip flights from Washington Dulles Airport to Islip chosen by KAYAK users via each layover airport in the last 12 months (only includes trips with the same layover airport on both legs).

Tampa (TPA) is the top choice – 50% of KAYAK users who clicked on 1-stop flights from Washington Dulles Airport to Islip picked an itinerary connecting there.

What is the cheapest layover airport when flying from Washington Dulles Airport to Islip?

Average round-trip price for 1-stop flights from Washington Dulles Airport to Islip clicked by KAYAK users in the last 12 months (only includes trips with the same layover airport on both legs).

Flights via Tampa (TPA) offer the most affordable fares, with an average round-trip price of $340.

Which layover airport offers the shortest total travel time from Washington Dulles Airport to Islip?

Shortest average total travel time for 1-stop one-way flights from Washington Dulles Airport to Islip via different layover airports, based on KAYAK user data from the last 12 months.

Consider flying via Orlando (MCO) for the shortest journey. The average one-way travel time for flights connecting there is 6h 04m.

Which layover airport has the quickest connection when flying from Washington Dulles Airport to Islip?

Average layover duration at different layover airports for 1-stop one-way flights from Washington Dulles Airport to Islip, based on KAYAK user data from the last 12 months.

If you prefer a quick connection, Orlando (MCO) often has the shortest layovers from Washington Dulles Airport to Islip, with an average of 0h 54m.

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Good to know

Cheapest flight$83
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 $83 for a one-way ticket and $238 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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