BUF - ISP

$116 Find Cheap Flights from Buffalo to Islip

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Buffalo to Islip departing on 8/21. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Islip

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Buffalo to Islip, 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 Buffalo to Islip, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 22% or moreCompare multiple travel sites with one search.

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

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

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

Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Buffalo to Islip (BUF-ISP)

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

Wed, Sep 17 - Thu, Sep 18
Southwest Logo
4:05 pm - 10:05 pmBUF-ISP
6h 00m1 stop
Southwest Logo
3:05 pm - 11:05 pmISP-BUF
8h 00m1 stop
$189Southwest
Find Deal
Wed, Sep 17 - Thu, Sep 18
Southwest Logo
6:10 am - 3:10 pmBUF-ISP
9h 00m2 stops
Southwest Logo
3:05 pm - 11:05 pmISP-BUF
8h 00m1 stop
$195Southwest
Find Deal
Tue, Sep 9 - Tue, Sep 16
Southwest Logo
7:40 am - 11:55 amBUF-ISP
4h 15m1 stop
Southwest Logo
6:05 am - 12:00 pmISP-BUF
5h 55m1 stop
$200Southwest
Find Deal
Tue, Sep 9 - Tue, Sep 16
Southwest Logo
7:40 am - 11:55 amBUF-ISP
4h 15m1 stop
Southwest Logo
5:30 am - 3:10 pmISP-BUF
9h 40m2 stops
$205Southwest
Find Deal
Sun, Aug 31 - Wed, Sep 3
Southwest Logo
6:30 am - 12:50 pmBUF-ISP
6h 20m1 stop
Southwest Logo
6:05 am - 12:00 pmISP-BUF
5h 55m1 stop
$212Southwest
Find Deal
Sun, Aug 31 - Wed, Sep 3
Southwest Logo
6:30 am - 12:50 pmBUF-ISP
6h 20m1 stop
Southwest Logo
6:05 am - 3:15 pmISP-BUF
9h 10m2 stops
$217Southwest
Find Deal
Fri, Oct 10 - Sat, Oct 11
JetBlue Logo
8:00 am - 2:44 pmBUF-ISP
6h 44m1 stop
JetBlue Logo
11:35 am - 9:46 pmISP-BUF
10h 11m1 stop
$454JetBlue
Find Deal
Thu, Aug 28 - Mon, Sep 1
Frontier Logo
11:12 am - 6:38 pmBUF-ISP
7h 26m1 stop
Frontier Logo
1:11 pm - 8:10 pmISP-BUF
6h 59m1 stop
$515Frontier
Find Deal
Fri, Aug 29 - Sun, Aug 31
Frontier Logo
10:12 am - 6:38 pmBUF-ISP
8h 26m1 stop
Frontier Logo
6:05 am - 5:52 pmISP-BUF
11h 47m1 stop
$656Frontier
Find Deal
Fri, Sep 5 - Fri, Sep 5
 Logo
6:00 am - 1:24 pmBUF-ISP
7h 24m2 stops
 Logo
4:33 pm - 11:59 pmISP-BUF
7h 26m2 stops
Booking Insights

KAYAK's insights & trends for Buffalo to Islip flights

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

Which airlines provide the cheapest flights from Buffalo to Islip?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Buffalo to Islip were found on Southwest ($189) and JetBlue ($454).

Good to know

Low seasonAugust
Cheapest flight$116
Best time to beat the crowds with an average 69% drop in price.
Most popular time to fly with an average 4% increase in price.
Flight from Buffalo to Islip

When to book flights from Buffalo to Islip

Are your dates flexible? Find out the best times to travel from Buffalo to Islip 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 Buffalo to Islip

  • What is the cheapest flight from Buffalo to Islip?

    In the last 3 days, the lowest price for a flight from Buffalo to Islip was $116 for a one-way ticket and $189 for a round-trip.

  • Do I need a passport to fly between Buffalo and Islip?

    A passport is not required to fly from Buffalo to Islip.

  • Which aircraft models fly most regularly from Buffalo to Islip?

    We unfortunately don’t have that data for this specific route.

  • How does KAYAK find such low prices on flights from Buffalo to Islip?

    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 Buffalo to Islip.

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

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

    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 Islip with an airline and back to Buffalo with another airline. Booking your flights between Buffalo and ISP can sometimes prove cheaper using this method.

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

    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 Islip from Buffalo 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 Buffalo to Islip

 
See real verified KAYAK customer reviews for airlines flying from Buffalo to Islip. 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 Buffalo to Islip? 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 4244 reviews
8.6Crew
7.0Food
7.5Entertainment
8.0Comfort
8.1Boarding
Airline reviews

Southwest's seats are the least comfortable I have ever sat in.

4.0 OkayDavid, Aug 2025DTW - STL
Read more Southwest reviews

Southwest's seats are the least comfortable I have ever sat in.

The cabin was quiet for the redeye flight. The area was clean. The staff was great. The 787 Max was in good condition. Drawbacks were that the seat widths were tight for some passengers. The seat padding was at best average and for a long flight uncomfortable.

Southwest like most American domestic airlines, is a mediocre airline. But it is among the cheapest. Oh well.

My flight was delayed 50 minutes and we were rushed to board to then sit for 15 minutes until the pilot arrived. Unacceptable since we could have waited to board. Also the delayed flight was updated AFTER we boarded to more than the 10 minutes as originally stated.

Other than a bit of a delay, everything was good. Again, the boarding process and picking seats is the only thing I don't enjoy.

If we are going to have to pay for luggage, make it easier to do. Put something on the app during check-in so I don't need to do it at the kiosk. I've done it twice recently and I ended up having to pay at the desk because something went wrong at the kiosk in Tampa.

southwest just starting charging for luggage. hadnt realized it until it was too late. now out $70 when i couldve bought a carry on if i wouldve known. free bags was one of the only reasons i chose southwest over another airline (the other being no assigned seats, which is apparently also being changed). stupid business decision. wont be flying southwest anymore.

The quality of Southwest Airlines continues to degrade each time I fly with them. If it were not for the free luggage, I would probably choose another airline. Their prices are a little bit competitive, but way too high for the quality of the service. Southwest is not unique in this way. Domestic flight in the United States of America has continued to be a lower and lower quality product. Very sad when you compare the quality of domestic airlines to that of many international airlines around the world.

Very smooth checking in our luggage with a super pleasant SW agent. I enjoyed a fun entertaining movie.

WiFi did not work. For as outrageous as these flights cost, when they’re advertised with certain services/ features they should be in working order

Everything you need to know for your flight from Buffalo to Islip

Information on your arrival and departure airports

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.