ISP - WAS

$109 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 6/3. 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

KAYAK searches 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
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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.

Recent round-trip flight deals from Islip to Washington, D.C.

KAYAK's recommended round-trip deals from the most popular airlines that fly from Islip to Washington, D.C..
Discover the best prices for you by selecting your travel dates on KAYAK.
Choose your dates
JetBlue Logo
6:00 am - 10:38 amISP-DCA
4h 38m1 stop
JetBlue Logo
3:00 pm - 9:15 pmDCA-ISP
6h 15m1 stop
$215JetBlue
Find Deal
Mon, Jun 16 - Fri, Jun 20
JetBlue Logo
6:00 am - 11:05 amISP-DCA
5h 05m1 stop
JetBlue Logo
8:00 pm - 4:50 pmDCA-ISP
20h 50m1 stop
$218JetBlue
Find Deal
Sat, May 10 - Mon, May 12
Southwest Logo
5:05 pm - 6:20 pmISP-BWI
1h 15mnonstop
Southwest Logo
9:55 pm - 11:05 pmBWI-ISP
1h 10mnonstop
$231Southwest
Find Deal
Sat, May 10 - Mon, May 12
JetBlue Logo
1:00 pm - 8:52 pmISP-DCA
7h 52m1 stop
JetBlue Logo
1:59 pm - 9:28 pmDCA-ISP
7h 29m1 stop
$242JetBlue
Find Deal
Wed, Apr 30 - Wed, May 7
Southwest Logo
6:10 pm - 7:25 pmISP-BWI
1h 15mnonstop
Southwest Logo
9:40 pm - 10:50 pmBWI-ISP
1h 10mnonstop
$244Southwest
Find Deal
Fri, Apr 25 - Wed, Apr 30
JetBlue Logo
6:00 am - 1:14 pmISP-DCA
7h 14m1 stop
JetBlue Logo
7:00 am - 4:50 pmDCA-ISP
9h 50m1 stop
$250JetBlue
Find Deal
Wed, May 7 - Sat, May 10
Southwest Logo
12:20 pm - 1:40 pmISP-BWI
1h 20mnonstop
Southwest Logo
9:35 pm - 10:45 pmBWI-ISP
1h 10mnonstop
$257Southwest
Find Deal
Sat, Aug 30 - Mon, Sep 1
Southwest Logo
6:10 pm - 7:25 pmISP-BWI
1h 15mnonstop
Southwest Logo
7:10 pm - 8:20 pmBWI-ISP
1h 10mnonstop
$258Southwest
Find Deal
Thu, Apr 24 - Fri, Apr 25
JetBlue Logo
11:45 am - 6:59 pmISP-DCA
7h 14m1 stop
JetBlue Logo
4:15 pm - 9:28 pmDCA-ISP
5h 13m1 stop
$291JetBlue
Find Deal
Tue, Apr 29 - Wed, Apr 30
 Logo
7:39 pm - 10:41 pmISP-BWI
27h 02m2 stops
 Logo
1:00 pm - 1:15 pmBWI-ISP
24h 15m2 stops
Thu, May 15 - Mon, May 19

KAYAK's insights & trends for Islip to Washington, D.C. flights

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 Islip to Washington, D.C. flight route?

The cheapest price for flight routes found by users searching on KAYAK in the last 2 weeks for round-trip flights from Islip to Washington, D.C..
Our data shows that the cheapest route for a return flight from Islip to Washington, D.C. cost $257 and was between Islip (ISP) and Baltimore (BWI). On average, the best prices are found if you fly this route. The average price for a return flight for this route is $257.

What’s the cheapest day of the week to fly from Islip to Washington, D.C.?

The average price of all round-trip flights from Islip to Washington, D.C. clicked on KAYAK for each day over the last 12 months.
For Islip to Washington, D.C., Tuesday is the cheapest day to fly on average and Sunday is the most expensive. Flying from Washington, D.C. back to Islip, the best deals are generally found on Tuesday, with Wednesday being the most expensive.

Can I save money by flying with a layover from Islip to Washington, D.C.?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.
No, with an average price for the route of $223, prices are generally cheapest when you fly direct.

Good to know

Low season

July

High season

October

Cheapest flight

$109
Best time to beat the crowds with an average 32% drop in price.
Most popular time to fly and prices are also 1% lower on average.
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 $109 for a one-way ticket and $215 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 airlines offer Wi-Fi service onboard planes from Islip to Washington, D.C.?

    JetBlue, and Delta offer inflight Wi-Fi service on the Islip to Washington, D.C. flight route.

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

    The Airbus A320neo 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

KAYAK’s top tips for finding a cheap flight from Islip to Washington, D.C.

  • Looking for a cheap flight? 25% of our users found flights on this route for $179 or less one-way and $323 or less round-trip.

Top airline flying from Islip to Washington, D.C.

 
See real verified KAYAK customer reviews for airlines flying from Islip to Washington, D.C.. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Islip to Washington, D.C.? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4274 reviews
7.6Entertainment
8.2Boarding
7.1Food
8.6Crew
8.0Comfort
Airline reviews

Boarding process, crew were good. But the seats were so uncomfortable that was all I could focus on. I literally had to sit forward so that all 3 of us could fit in row. I will try to avoid Southwest in the future for any flights over 60 minutes.

6.0 GoodCarolynn, Mar 2025KOA - SMF
Read more Southwest reviews

Boarding process, crew were good. But the seats were so uncomfortable that was all I could focus on. I literally had to sit forward so that all 3 of us could fit in row. I will try to avoid Southwest in the future for any flights over 60 minutes.

1.5 hour delay, poor service, no compassion from the crew. Terrible experience

Great flight, 47 passengers on a 180 seat plane. Stewardess was pleasant and cheerful.

Short flight with plenty of open seats. Drinks and snacks were still provided even on such a short flight. <1 hr

I liked the crew member who gave flight instructions on "in case of a problem:. The seats are so small that only a young teenager could sit in middle seat.

Great experience flying Southwest. The crew was really kind and helpful, and very friendly with our toddler.

Very good. Sad to learn Southwest is going start to charge for bags

Our flight was diverted from being a non-stop to getting within 150 miles and requiring another plane. We heard 4 or 5 different versions from SW as to why we had to stop, then wait for a replacement plane. Five hour delay, weather did not come up as a single excuse.... communication was not clear and well explained. No one really took charge!

My flight to Chicago left and landed early. My return flight left two minutes late and arrived 2 minutes late. My seat selections were ideal! There were no snacks going to Chicago and no snacks on the return trip. There are no charging outlets on board.

WiFi on the flight was not working. Thus, entertainment options were limited.

Everything you need to know for your flight from Islip to Washington, D.C.

Information on your arrival and departure airports

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