Find flights
Deals
Insights
When to book
FAQs & Tips

ISP - WAS

$135 Find cheap flights from Islip to Washington, D.C.

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Islip to Washington, D.C. departing on 7/16. 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
0 bags
Sat 7/6
Sat 7/13

Search hundreds of travel sites at once for deals on flights to Washington, D.C.

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Islip to Washington, D.C., 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 Islip to Washington, D.C., as well as popular online travel agencies
In the last 7 days travelers have searched 43,995,393 times on KAYAK, and here is why:

Save 21% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Bundle and saveSave money when you bundle your flight + hotel.

Cheap flight deals from Islip to Washington, D.C. (ISP-WAS)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Islip to Washington, D.C. 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 and deals for you by selecting your travel dates.
Choose your dates
10:00 am - 8:45 pmISP-BWI
10h 45m1 stop
3:25 pm - 8:26 amBWI-ISP
17h 01m1 stop
$234Frontier
Find Deal
Thu, Sep 19 - Mon, Sep 30
3:03 pm - 8:26 pmISP-BWI
5h 23m1 stop
3:25 pm - 8:26 amBWI-ISP
17h 01m1 stop
$246Frontier
Find Deal
Tue, Sep 10 - Wed, Sep 25
5:45 pm - 7:50 amISP-BWI
14h 05m1 stop
9:43 pm - 10:29 amBWI-ISP
12h 46m1 stop
$258Frontier
Find Deal
Thu, Jul 4 - Thu, Jul 11
9:43 pm - 7:47 amISP-BWI
10h 04m1 stop
3:37 pm - 7:58 amBWI-ISP
16h 21m1 stop
$266Frontier
Find Deal
Tue, Jul 2 - Tue, Jul 9
10:00 am - 8:45 pmISP-BWI
10h 45m1 stop
9:10 pm - 8:55 amBWI-ISP
11h 45m1 stop
$278Frontier
Find Deal
Fri, Sep 6 - Mon, Sep 9
1:05 pm - 8:35 amISP-BWI
19h 30m2 stops
10:40 pm - 5:07 pmBWI-ISP
18h 27m2 stops
$282
Find Deal
Thu, Jul 4 - Thu, Jul 11
1:05 pm - 8:35 amISP-BWI
19h 30m2 stops
10:40 pm - 5:07 pmBWI-ISP
18h 27m2 stops
$294
Find Deal
Thu, Jul 4 - Thu, Jul 11
1:05 pm - 4:31 pmISP-BWI
27h 26m3 stops
10:40 pm - 5:07 pmBWI-ISP
18h 27m2 stops
$311
Find Deal
Thu, Jul 4 - Thu, Jul 11
1:05 pm - 4:31 pmISP-BWI
27h 26m3 stops
9:45 pm - 5:07 pmBWI-ISP
19h 22m2 stops
$322
Find Deal
Thu, Jul 4 - Thu, Jul 11
5:45 pm - 7:50 amISP-BWI
14h 05m1 stop
8:20 pm - 10:51 amBWI-ISP
14h 31m1 stop
$327Frontier
Find Deal
Thu, Jul 4 - Fri, Jul 12

Flights from Islip to Washington, D.C. - Travel Insights & Trends

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

What is the cheapest month to fly from Islip to Washington, D.C.?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Islip to Washington, D.C., removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Islip to Washington, D.C. is October, where tickets cost $188 on average. On the other hand, the most expensive months are February and March, where the average cost of tickets is $243 and $243 respectively.

How far in advance should I book a flight from Islip to Washington, D.C.?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Islip to Washington, D.C., removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Islip to Washington, D.C., you should book around 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 83 days before departure.

How many flights are there between Islip and Washington, D.C. per day?

Each day, there are between 3 and 9 nonstop flights that take off from Islip and land in Washington, D.C., with an average flight time of 1h 15m. The most common departure time is 12:00 pm and most flights take off in the morning, while the most flights land at Baltimore. Each week, there are 39 flights. The most frequent day of departure is Friday, when 23% of all weekly flights depart. The fewest flights depart on a Sunday.

What’s the earliest departure time from Islip to Washington, D.C.?

Early birds can take the earliest flight from Islip at 5:25 am and will be landing in Washington, D.C. at 6:40 am.

What’s the latest departure time from Islip to Washington, D.C.?

If you prefer to fly at night, the latest flight from Islip to Washington, D.C. jets off at 5:55 pm and lands at 7:10 pm.

Good to know

Cheapest flight

$135
Flight from Islip to Baltimore

When to book flights from Islip to Washington, D.C.

Are your dates flexible? Find out the best times to travel from Islip to Washington, D.C. 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 flights from Islip to Washington, D.C.

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

    In the last 3 days, the lowest price for a flight from Islip to Washington, D.C. was $135 for a one-way ticket and $234 for a round-trip.

  • Do I need a passport to fly between Islip and Washington, D.C.?

    No, a passport isn't needed to fly from Islip to Washington, D.C.. However, local authorities might ask for an official ID.

  • Which airports will I be using when flying from Islip to Washington, D.C.?

    When flying out of Islip you will be using Islip Long Island. You will be landing at one of these airports: Washington, D.C. Reagan-National or Washington, D.C. Dulles Intl.

  • Which aircraft models fly most regularly from Islip to Washington, D.C.?

    The Boeing 737-800 Passenger/BBJ2 (winglets) is the aircraft model that flies most regularly on the Islip to Washington, D.C. flight route.

  • On which days can I fly direct from Islip to Washington, D.C.?

    There are nonstop flights from Islip to Washington, D.C. on a daily basis.

  • How does KAYAK find such low prices on flights from Islip to Washington, D.C.?

    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 Islip to Washington, D.C..

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Islip to Washington, D.C.?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Washington, D.C. from Islip 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 Islip to Washington, D.C.?

    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 Washington, D.C. with an airline and back to Islip with another airline.

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

    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 Washington, D.C. from Islip up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Book cheap flights from Islip to Washington, D.C.

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Islip to Washington, D.C. found on KAYAK in the last 72 hours.
7/16Tue
1 stopFrontier
10h 07mISP-BWI
$135
6/20Thu
2 stops
19h 30mISP-BWI
$153
7/29Mon
3 stops
28h 38mISP-BWI
$161
6/21Fri
2 stops
18h 38mISP-BWI
$174
7/21Sun
1 stopFrontier
20h 44mISP-BWI
$179
7/29Mon
1 stopFrontier
21h 55mISP-BWI
$180
6/20Thu
3 stops
23h 32mISP-BWI
$188
6/21Fri
3 stops
26h 34mISP-BWI
$215
7/29Mon
2 stops
18h 43mISP-BWI
$255
6/20Thu
1 stopFrontier
8h 08mISP-BWI
$259

Search by stops

Search by airline

Search by price

Last minute flights from Islip to Washington, D.C.

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Islip to Washington, D.C. that are departing in the next 10 days.
6/11Tue
multi-stopFrontier
9h 54mISP-BWI
6/13Thu
multi-stopFrontier
10h 01mBWI-ISP
$988
6/11Tue
multi-stopFrontier
9h 54mISP-BWI
6/12Wed
multi-stopFrontier
14h 08mBWI-ISP
$991
6/7Fri
multi-stop
18h 38mISP-BWI
6/8Sat
multi-stop
16h 21mBWI-ISP
$997
6/7Fri
multi-stop
18h 38mISP-BWI
6/8Sat
multi-stop
18h 15mBWI-ISP
$1,032
6/11Tue
multi-stopFrontier
9h 54mISP-BWI
6/18Tue
multi-stopFrontier
11h 28mBWI-ISP
$1,048
6/8Sat
multi-stopFrontier
21h 56mISP-BWI
6/11Tue
multi-stopFrontier
11h 28mBWI-ISP
$1,155
6/7Fri
multi-stopFrontier
28h 33mISP-BWI
6/8Sat
multi-stopFrontier
12h 30mBWI-ISP
$1,157
6/7Fri
multi-stop
23h 38mISP-BWI
6/8Sat
multi-stop
18h 15mBWI-ISP
$1,181

Search by stops

Search by airline

Search by price

Islip - Washington, D.C. Flights

Departure:

Islip (ISP)United States

Return flight deals:

Washington, D.C. - Islip

Cabin classes:

$468

Browse origins:

Browse destinations: