$156 Find Cheap Flights from Islip to District of Columbia - 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 District of Columbia departing on 8/28. 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

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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

Sat, Aug 29 - Tue, Sep 1
JetBlue Logo
10:06 am - 7:59 pm
ISP
-
DCA
9h 53m
1 stop
JetBlue Logo
3:20 pm - 9:49 pm
DCA
-
ISP
6h 29m
1 stop
$313JetBlue
Sat, Aug 29 - Tue, Sep 1
JetBlue Logo
6:00 am - 2:13 pm
ISP
-
DCA
8h 13m
1 stop
JetBlue Logo
3:20 pm - 9:49 pm
DCA
-
ISP
6h 29m
1 stop
$319JetBlue
Sat, Sep 5 - Sun, Sep 6
Southwest Logo
2:00 pm - 9:55 pm
ISP
-
DCA
7h 55m
1 stop
Southwest Logo
7:55 am - 3:45 pm
DCA
-
ISP
7h 50m
1 stop
$357Southwest
Fri, Sep 4 - Wed, Sep 9
Southwest Logo
1:15 pm - 11:55 pm
ISP
-
DCA
10h 40m
2 stops
Southwest Logo
6:00 am - 2:55 pm
DCA
-
ISP
8h 55m
1 stop
$362Southwest
Fri, Oct 2 - Sat, Oct 3
Southwest Logo
6:55 am - 3:55 pm
ISP
-
DCA
9h 00m
1 stop
Southwest Logo
6:00 am - 3:05 pm
DCA
-
ISP
9h 05m
2 stops
$368Southwest
Fri, Sep 11 - Sun, Sep 13
JetBlue Logo
7:00 am - 2:58 pm
ISP
-
DCA
7h 58m
1 stop
JetBlue Logo
7:05 am - 3:36 pm
DCA
-
ISP
8h 31m
1 stop
$369JetBlue
Tue, Sep 8 - Thu, Sep 10
JetBlue Logo
1:30 pm - 7:59 pm
ISP
-
DCA
6h 29m
1 stop
JetBlue Logo
4:35 pm - 11:22 pm
DCA
-
ISP
6h 47m
1 stop
$371JetBlue
Sun, Aug 30 - Sun, Sep 6
Southwest Logo
7:00 am - 3:55 pm
ISP
-
DCA
8h 55m
1 stop
Southwest Logo
7:55 am - 3:45 pm
DCA
-
ISP
7h 50m
1 stop
$377Southwest
Fri, Sep 11 - Sun, Sep 13
Southwest Logo
1:15 pm - 11:55 pm
ISP
-
DCA
10h 40m
2 stops
Southwest Logo
12:55 pm - 11:20 pm
DCA
-
ISP
10h 25m
1 stop
$378Southwest
Thu, Aug 20 - Mon, Aug 24
JetBlue Logo
11:35 am - 7:59 pm
ISP
-
DCA
8h 24m
1 stop
JetBlue Logo
3:20 pm - 9:44 pm
DCA
-
ISP
6h 24m
1 stop
$385JetBlue
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 5 days was to Baltimore, at $246 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 5 days was $246.

Good to know

Cheapest flight

$156
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 4229 reviews
8.6Crew
8.0Comfort
8.1Boarding
7.5Entertainment
7.0Food
Airline reviews

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!

2.0 MediocreDawn, Jun 2026
BUF - BWI
Read more Southwest reviews

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!

We had a 5 hour delay on the tarmac in Baltimore

Airline travel is always too cramped to really be pleasant, but the cabin crew on this flight did a pretty good job of making up for it by putting on some music during boarding and sprinkling a few funny remarks into the safety briefing and announcements, and just generally being friendly and helpful. It definitely reminded me of why I prefer the in-flight experience on Southwest!

Flight was delayed due to plane not passing inspection And one of the crew had to time out and we had to wait for another one A 3 hour delay

It was one and half hour late... Not sure if any other experience matters.

It was 2 hours 45 minutes late, for no apparently clear reason.

It went well. Plane wasn't full. Will be great when assigned seating is in place

The flight was delayed about 20 minutes, but this was an evening flight, so it comes as no surprise. This flight came a good 1.5 days ahead of hurricane Helene which was still far out in the gulf. However, the flight never removed the seated buckle light. The staff announced from the beginning that due to the bad weather (I suppose the hurricane a day and a half away) they would have to do an abbreviated service with water and a snack. I am fine with their water and snack offering, but this was one of the smoothest flights I've had in years. If Southwest believes a flight like this requires everyone to remain seated, then all of their flights should remain buckled for the entire flight. I cannot help but wonder if things like this are a sneaky way to cut back on expenses since the airline is currently under a lot of pressure to reduce costs.

Although the flight was delayed, but the crew was amazing. They did the best they could to make the time enjoyable.

My experience was find with Southwest. The only issue I have is...at the exact time for me to check in...I don't understand how I always end up in C.

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

Information on your arrival and departure airports