IAD - ISP

$86 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 3/1. 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, 0 bags

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
$226
Frontier
Sun 3/1Fri 3/6
IAD - ISP • 1 stop
Cheapest one-way
$86
Frontier
Sun 3/1
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

Sun, Mar 1 - Fri, Mar 6
Frontier Logo
10:10 am - 7:38 am
IAD
-
ISP
21h 28m
1 stop
Frontier Logo
6:00 am - 1:44 pm
ISP
-
IAD
7h 44m
1 stop
$226Frontier
Sun, Mar 1 - Fri, Mar 6
Multiple Airlines Logo
10:10 am - 7:38 am
IAD
-
ISP
21h 28m
1 stop
Multiple Airlines Logo
2:31 pm - 12:30 pm
ISP
-
IAD
45h 59m
2 stops
$274Multiple Airlines
Mon, Mar 2 - Fri, Mar 6
Frontier Logo
8:15 am - 2:39 pm
IAD
-
ISP
6h 24m
1 stop
Frontier Logo
6:00 am - 1:44 pm
ISP
-
IAD
7h 44m
1 stop
$295Frontier
Thu, May 14 - Sun, May 17
Multiple Airlines Logo
6:20 am - 6:06 pm
IAD
-
ISP
11h 46m
2 stops
Multiple Airlines Logo
4:07 pm - 7:27 am
ISP
-
IAD
15h 20m
1 stop
$316Multiple Airlines
Thu, May 14 - Sun, May 17
Multiple Airlines Logo
6:20 am - 6:06 pm
IAD
-
ISP
11h 46m
2 stops
Multiple Airlines Logo
4:07 pm - 7:27 am
ISP
-
IAD
15h 20m
1 stop
$317Multiple Airlines
Thu, Mar 5 - Mon, Mar 9
Frontier Logo
10:10 am - 12:47 pm
IAD
-
ISP
26h 37m
1 stop
Frontier Logo
1:22 pm - 12:31 am
ISP
-
IAD
11h 09m
2 stops
$320Frontier
Fri, Mar 6 - Sun, Mar 8
Frontier Logo
2:39 pm - 9:48 am
IAD
-
ISP
19h 09m
1 stop
Frontier Logo
5:08 pm - 7:24 am
ISP
-
IAD
14h 16m
1 stop
$342Frontier
Thu, Mar 12 - Sun, Mar 15
Multiple Airlines Logo
8:15 am - 4:13 pm
IAD
-
ISP
7h 58m
1 stop
Multiple Airlines Logo
4:34 pm - 2:18 pm
ISP
-
IAD
21h 44m
2 stops
$394Multiple Airlines
Thu, Mar 12 - Sun, Mar 15
Frontier Logo
8:15 am - 12:47 pm
IAD
-
ISP
28h 32m
1 stop
Frontier Logo
4:34 pm - 7:24 am
ISP
-
IAD
14h 50m
1 stop
$413Frontier
Tue, May 26 - Sun, May 31
Multiple Airlines Logo
6:08 pm - 9:08 am
IAD
-
ISP
15h 00m
1 stop
Multiple Airlines Logo
7:47 pm - 5:35 pm
ISP
-
IAD
21h 48m
2 stops
$426Multiple Airlines
Booking Insights

Good to know

Cheapest flight$86
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 $86 for a one-way ticket and $226 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)