ISP - BUF

$122 Find Cheap Flights from Islip to Buffalo

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 Buffalo 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

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

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

Cheap Flights from Islip to Buffalo (ISP-BUF)

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

za, sep. 13 - za, sep. 20
Southwest Logo
3:40 pm - 9:40 pmISP-BUF
6h 00m1 stop
Southwest Logo
8:30 am - 4:10 pmBUF-ISP
7h 40m1 stop
$161Southwest
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za, sep. 13 - za, sep. 20
Southwest Logo
5:40 am - 3:15 pmISP-BUF
9h 35m2 stops
Southwest Logo
8:30 am - 4:10 pmBUF-ISP
7h 40m1 stop
$166Southwest
Find Deal
do, okt. 30 - zo, nov. 2
Southwest Logo
5:35 pm - 8:45 pmISP-BUF
3h 10m1 stop
Southwest Logo
7:55 am - 12:50 pmBUF-ISP
4h 55m1 stop
$171Southwest
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do, okt. 30 - zo, nov. 2
Southwest Logo
5:30 am - 2:35 pmISP-BUF
9h 05m2 stops
Southwest Logo
7:55 am - 12:50 pmBUF-ISP
4h 55m1 stop
$176Southwest
Find Deal
za, sep. 27 - ma, sep. 29
Frontier Logo
5:18 pm - 12:38 pmISP-BUF
19h 20m1 stop
Frontier Logo
6:59 pm - 10:40 amBUF-ISP
15h 41m1 stop
$240Frontier
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wo, sep. 17 - za, sep. 20
Frontier Logo
11:35 am - 11:22 amISP-BUF
23h 47m2 stops
Frontier Logo
7:11 pm - 10:40 amBUF-ISP
15h 29m1 stop
$279Frontier
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vr, sep. 26 - zo, sep. 28
JetBlue Logo
11:35 am - 10:20 pmISP-BUF
10h 45m1 stop
JetBlue Logo
8:00 am - 3:23 pmBUF-ISP
7h 23m1 stop
$378JetBlue
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wo, sep. 17 - za, sep. 20
JetBlue Logo
11:35 am - 10:20 pmISP-BUF
10h 45m1 stop
JetBlue Logo
8:00 am - 3:23 pmBUF-ISP
7h 23m1 stop
$397JetBlue
Find Deal
di, aug. 26 - di, sep. 2
Logo
4:33 pm - 4:52 pmISP-BUF
24h 19m2 stops
Logo
8:00 pm - 1:24 pmBUF-ISP
17h 24m2 stops
$730
Find Deal
za, nov. 1 - di, nov. 4
Logo
7:30 am - 9:00 pmISP-BUF
13h 30m3 stops
Logo
6:00 am - 1:24 pmBUF-ISP
7h 24m2 stops
$755
Find Deal
Booking Insights

KAYAK's insights & trends for Islip to Buffalo flights

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

Which airlines provide the cheapest flights from Islip to Buffalo?

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 Islip to Buffalo were found on Southwest ($161) and Frontier ($240).

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Good to know

Low seasonSeptember
Cheapest flight$122
Best time to beat the crowds with an average 53% drop in price.
Most popular time to fly and prices are also 53% lower on average.
Flight from Islip to Buffalo

When to book flights from Islip to Buffalo

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

  • What is the cheapest flight from Islip to Buffalo?

    In the last 3 days, the lowest price for a flight from Islip to Buffalo was $122 for a one-way ticket and $161 for a round-trip.

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

    No, a passport isn't needed to fly from Islip to Buffalo. However, local authorities might ask for an official ID.

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

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

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

    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 Buffalo.

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

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

    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 Buffalo with an airline and back to Islip with another airline. Booking your flights between Islip and BUF 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 Islip to Buffalo?

    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 Buffalo from Islip 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 Buffalo

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

Near 4 hour flight with only 1 service. Had to use call button to request water. Internet and power not working until into flight. Internet would stop working during flight.

6.0 GoodDavid, Aug 2025MCO - DEN
Read more Southwest reviews

Near 4 hour flight with only 1 service. Had to use call button to request water. Internet and power not working until into flight. Internet would stop working during flight.

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.

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

Information on your arrival and departure airports

Islip (ISP)
Buffalo (BUF)

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