ISP - WAS

$114 Find Cheap Flights from Islip to Washington, D.C. - Compare and Save

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 8/26. 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 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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Everything you should know

Cheapest round-trip
$228
Typical prices: $655-$443
Southwest
Wed 8/12Tue 8/18
ISP - BWI • Non-stop
Cheapest one-way
$114
Typical prices: $179-$190
Southwest
Wed 8/26
ISP - BWI • Non-stop
Top airlines
Cheapest • from $228 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
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Airline reviews
Airline reviews
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Top routes
Cheapest
Most popular
Insights
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When to travel
Cheapest • 100% price drop
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Booking Insights
Flight Deals

Cheap Flights 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 for you by selecting your travel dates on KAYAK.

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

Wed, Aug 12 - Tue, Aug 18
Southwest Logo
10:55 am - 12:15 pm
ISP
-
BWI
1h 20mnonstop
Southwest Logo
9:05 am - 10:15 am
BWI
-
ISP
1h 10mnonstop
$228Southwest
Tue, Jul 21 - Tue, Jul 28
Southwest Logo
8:55 am - 10:10 am
ISP
-
BWI
1h 15mnonstop
Southwest Logo
6:50 am - 8:05 am
BWI
-
ISP
1h 15mnonstop
$263Southwest
Wed, Jul 1 - Tue, Jul 7
Southwest Logo
4:40 pm - 5:55 pm
ISP
-
BWI
1h 15mnonstop
Southwest Logo
6:50 am - 8:05 am
BWI
-
ISP
1h 15mnonstop
$269Southwest
Sat, Jul 11 - Sat, Jul 18
Southwest Logo
5:55 am - 7:10 am
ISP
-
BWI
1h 15mnonstop
Southwest Logo
10:00 pm - 11:15 pm
BWI
-
ISP
1h 15mnonstop
$275Southwest
Thu, Sep 3 - Mon, Sep 7
Southwest Logo
12:35 pm - 1:50 pm
ISP
-
BWI
1h 15mnonstop
Southwest Logo
11:25 am - 12:35 pm
BWI
-
ISP
1h 10mnonstop
$283Southwest
Tue, Aug 25 - Tue, Sep 8
Multiple Airlines Logo
5:27 pm - 4:24 pm
ISP
-
BWI
22h 57m
2 stops
Multiple Airlines Logo
8:17 pm - 9:33 am
BWI
-
ISP
13h 16m
1 stop
$291Multiple Airlines
Tue, Aug 25 - Fri, Sep 4
Multiple Airlines Logo
5:27 pm - 4:24 pm
ISP
-
BWI
22h 57m
2 stops
Multiple Airlines Logo
9:59 pm - 10:03 am
BWI
-
ISP
12h 04m
1 stop
$296Multiple Airlines
Sat, Aug 29 - Tue, Sep 8
Multiple Airlines Logo
11:57 am - 7:45 am
ISP
-
BWI
43h 48m
2 stops
Multiple Airlines Logo
8:17 pm - 9:33 am
BWI
-
ISP
13h 16m
1 stop
$307Multiple Airlines
Tue, Jul 14 - Tue, Jul 21
JetBlue Logo
6:00 am - 2:15 pm
ISP
-
DCA
8h 15m
1 stop
JetBlue Logo
3:10 pm - 9:44 pm
DCA
-
ISP
6h 34m
1 stop
$373JetBlue
Tue, Jul 21 - Wed, Jul 22
JetBlue Logo
4:58 pm - 11:33 pm
ISP
-
DCA
6h 35m
1 stop
JetBlue Logo
3:10 pm - 9:44 pm
DCA
-
ISP
6h 34m
1 stop
$413JetBlue
Booking Insights

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.

How much is a round-trip flight from Islip, New York to Washington, D.C.?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Islip, New York to Washington, D.C. departing in August.

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

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest return flight from Islip to Washington, D.C. costs $268 on the route between Islip (ISP) and Baltimore (BWI). It is also the most popular route.

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 round-trip 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 February, where tickets cost $0 (return) on average. On the other hand, the most expensive months are July and August, where the average cost of round-trip tickets is $766 and $766 respectively.

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 $328, prices are generally cheapest when you fly direct.

Good to know

Low seasonDecember
Cheapest flight$114
Best time to beat the crowds with an average 45% drop in price.
Most popular time to fly and prices are also 18% 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 5 days, the lowest price for a flight from Islip to Washington, D.C. was $114 for a one-way ticket and $228 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 A320-100/200 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.

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 $205 or less one-way and $348 or less round-trip.

Reviews of the 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.
7.9
SouthwestOverall score based on 4237 reviews
8.1Boarding
7.5Entertainment
8.0Comfort
8.6Crew
7.0Food
Airline reviews

Flight was delayed over 3 hours. Planes were dirty. Staff indifferent. And they serve vegan pretzels as snacks.

2.0 MediocreMatthew, Jun 2026
CVG - MDW
Read more Southwest reviews

Flight was delayed over 3 hours. Planes were dirty. Staff indifferent. And they serve vegan pretzels as snacks.

It was great. The gate staff were very helpful in Portland when my son forgot his rolling bag and had to go back to get it just in time to make it on the plane. We really appreciate that. Great job!

Airline is not very senior friendly. Flights are late, forcing us to run to the connecting flight. Food is awful. Wish they would go back to pretzels and peanuts. During flight, pressurization isn’t quite right and all of our ears get plugged. Everything is nickel and dime, charging for boarding, seat selection and legroom. While a screen at the desk in the gate area says check your roll on bag now for free due to space limitation, the employee at the desk will not check the bag without a $100 fee. Insane.

Kayak could’ve posted the correct gate number. Almost missed my flight.

Slow boarding, limited food and drink portions. Bad delays and turbulence

there were two flight attendants that were up front...that were the best! They get KUDOs for making my trip only fantastic. Tell them Jeff said that!

OKay. I sat in the back of the plane and it was really loud between babies and little kids, and adults who.like to talk a lot and loudly most of the flight.

Flight coming out of Buffalo was delayed, so we had to be rescheduled on another flight from Baltimore to Phoenix which means we had a long layover and got home 3.5 hours late. Shuttle to parking stopped at 10pm, so we had to pay for an Uber to the parking lot and got charged an extra day of parking since it was after midnight. Not the best experience. Long day!

Was fine, delayed and feels like southwest is always late

I don't know why flying out of Sarasota requires two plane changes.

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

Information on your arrival and departure airports