$247 Find Cheap Flights from Islip to District of Columbia

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 District of Columbia departing on 3/15. 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 District of Columbia

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Islip to District of Columbia, 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 District of Columbia, as well as popular online travel agencies
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Flight Deals

Book Cheap Islip to District of Columbia Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Islip to District of Columbia 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 District of Columbia

Fri, Apr 24 - Mon, Apr 27
Southwest Logo
5:10 pm - 10:50 pm
ISP
-
DCA
5h 40m
1 stop
Southwest Logo
6:00 am - 12:05 pm
DCA
-
ISP
6h 05m
1 stop
$327Southwest
Wed, Feb 25 - Wed, Mar 4
Southwest Logo
9:15 am - 3:45 pm
ISP
-
DCA
6h 30m
1 stop
Southwest Logo
7:55 am - 2:35 pm
DCA
-
ISP
6h 40m
1 stop
$347Southwest
Wed, Feb 25 - Wed, Mar 4
Southwest Logo
9:15 am - 6:00 pm
ISP
-
DCA
8h 45m
2 stops
Southwest Logo
7:55 am - 2:35 pm
DCA
-
ISP
6h 40m
1 stop
$352Southwest
Fri, Feb 27 - Sun, Mar 1
Southwest Logo
6:35 am - 2:55 pm
ISP
-
DCA
8h 20m
1 stop
Southwest Logo
7:30 am - 4:45 pm
DCA
-
ISP
9h 15m
1 stop
$417Southwest
Wed, Mar 18 - Sun, Mar 22
Southwest Logo
2:20 pm - 10:35 pm
ISP
-
DCA
8h 15m
2 stops
Southwest Logo
7:25 am - 5:15 pm
DCA
-
ISP
9h 50m
2 stops
$427Southwest
Mon, Mar 23 - Tue, Mar 24
Southwest Logo
12:15 pm - 10:55 pm
ISP
-
DCA
10h 40m
2 stops
Southwest Logo
4:00 pm - 10:40 pm
DCA
-
ISP
6h 40m
1 stop
$432Southwest
Wed, Mar 18 - Sun, Mar 22
Southwest Logo
2:20 pm - 10:35 pm
ISP
-
DCA
8h 15m
2 stops
Southwest Logo
6:55 am - 5:15 pm
DCA
-
ISP
10h 20m
1 stop
$439Southwest
Sun, Apr 5 - Mon, Apr 6
Southwest Logo
12:20 pm - 8:50 pm
ISP
-
DCA
8h 30m
1 stop
Southwest Logo
6:05 am - 4:30 pm
DCA
-
ISP
10h 25m
1 stop
$453Southwest
Wed, Mar 18 - Sun, Mar 22
Southwest Logo
6:10 am - 12:00 pm
ISP
-
DCA
5h 50m
1 stop
Southwest Logo
6:55 am - 5:15 pm
DCA
-
ISP
10h 20m
1 stop
$495Southwest
Mon, Mar 23 - Tue, Mar 24
Southwest Logo
12:15 pm - 10:45 pm
ISP
-
DCA
10h 30m
1 stop
Southwest Logo
4:00 pm - 10:40 pm
DCA
-
ISP
6h 40m
1 stop
$505Southwest
Booking Insights

KAYAK's insights & trends for Islip to District of Columbia flights

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

What is the cheapest Islip to District of Columbia flight route?

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

The cheapest ticket to District of Columbia from Islip found in the last 72 hours was to Baltimore, at $207 round-trip. The most popular route is from Islip (ISP) to Baltimore (BWI), and the cheapest round-trip airline ticket found on this route in the last 72 hours was $207.

Good to know

Low seasonDecember
Cheapest flight$247
Best time to beat the crowds with an average 48% drop in price.
Most popular time to fly and prices are also 40% lower on average.
Flight from Islip to Reagan Washington National Airport

FAQs - booking District of Columbia flights

  • How does KAYAK find such low prices on flights from Islip to District of Columbia?

    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 District of Columbia.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Islip to District of Columbia?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Islip to District of Columbia 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 District of Columbia?

    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 from Islip to District of Columbia with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Islip to District of Columbia?

    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 from Islip to District of Columbia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Islip to District of Columbia

 
See real verified KAYAK customer reviews for airlines flying from Islip to District of Columbia. 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 District of Columbia? 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 4273 reviews
7.5Entertainment
8.0Comfort
8.1Boarding
7.0Food
8.6Crew
Airline reviews

Flight attendants very hospitable and friendly. Pilot flew a smooth take off and landing.

10.0 ExcellentAnonymous, Feb 2026
MSY - PHX
Read more Southwest reviews

Flight attendants very hospitable and friendly. Pilot flew a smooth take off and landing.

Paid for premium extra leg room but the bin space for rows 1-3 had to go in rows 4-6 and 4-6 had to go to 7-9 because flight attendants have snacks and their luggage upfront. So we pay extra to have to fight thru traffic to get our bags. Only 2nd day of new seating so hope they fix this.

WIFI was great. My selection for seating is an aisle, but during my trip, I never had an aisle seat. If we can get that corrected, I will be thrilled. No snack or drink on this flight.

WIFI was great. My selection for seating is an aisle, but during my trip, I never had an aisle seat. If we can get that corrected, I will be thrilled.

The wifi on the plane is great. The only issue that I have is that I prefer an aisle seat and on my trips this week, I was either in the middle or window. If we can work to secure aisle seating, I will be thrilled. Nice trip.

All good except once again bags took an hour at Midway Airport Happens all the time. Ridiculous

Everything went smoothly and we even arrived a little bit early.

Great vacation. Can't wait till next year for another one.

Great flight but super high price. Glad it was a business trip and not personal

On time. Friendly staff. Took to long to pre bord all the specialty groups. Cramped small plane

Everything you need to know for your flight from Islip to District of Columbia

Information on your arrival and departure airports