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$109+ Cheap flights from Islip, NY to Buffalo (ISP - BUF)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/16. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — BUF
Apr 12 — Apr 191
Sun 4/12
Sun 4/19
1 adult, Economy
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Cheap flight deals from Islip to Buffalo

Cheapest flights from Islip to Buffalo
Explore the most affordable flight options available from Islip to Buffalo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 13, 2026.

This Southwest deal was found by Cheapflights users on 3/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/164:40 pm
ISP
-
BUF
1 stop4h 00m
Southwest
Tue 5/191:10 pm
BUF
-
ISP
1 stop5h 20m
Southwest
Deal found 3/8$197
This Southwest deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/1612:30 pm
ISP
-
BUF
1 stop7h 15m
Southwest
Mon 4/204:00 pm
BUF
-
ISP
1 stop4h 25m
Southwest
Deal found 3/12$212
This Southwest deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/2412:30 pm
ISP
-
BUF
1 stop7h 15m
Southwest
Mon 4/2712:40 pm
BUF
-
ISP
1 stop3h 50m
Southwest
Deal found 3/12$230
This Southwest deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/289:00 am
ISP
-
BUF
1 stop3h 15m
Southwest
Wed 4/299:45 am
BUF
-
ISP
1 stop4h 05m
Southwest
Deal found 3/12$267
This Southwest deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/94:40 pm
ISP
-
BUF
1 stop6h 00m
Southwest
Sun 6/146:10 am
BUF
-
ISP
1 stop5h 35m
Southwest
Deal found 3/11$272
This Southwest deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/94:40 pm
ISP
-
BUF
1 stop6h 00m
Southwest
Sat 6/135:25 pm
BUF
-
ISP
1 stop5h 45m
Southwest
Deal found 3/11$312

Find flight deals from Islip to Buffalo

Discover tips and strategies to find the most affordable flight options for your journey from Islip (ISP) to Buffalo (BUF). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated March 13, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$197
(Southwest)

One-way from

$109
(Southwest)

Popular in

January

Cheapest in

February

Average price

$197
Provider with most accurate pricing for Islip Long Island-Buffalo flight deals.
Search Deals
Provider most trusted by Cheapflights users for Islip Long Island-Buffalo flights.
Search Deals
From Islip Long Island to Buffalo
Search Deals
One-way flight from Islip Long Island to Buffalo
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($21 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Islip to Buffalo that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 13, 2026.
Use the filters below to find and compare flights from Islip to Buffalo that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Sat 5/16

4:40 pm-8:40 pm

1 stop4h 00m

Buffalo

Tue 5/19

1:10 pm-6:30 pm

1 stop5h 20m

$197

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Tue 4/28

9:00 am-12:15 pm

1 stop3h 15m

Buffalo

Wed 4/29

3:10 pm-10:10 pm

2 stops7h 00m

$273

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Tue 6/9

4:40 pm-10:40 pm

1 stop6h 00m

Buffalo

Sat 6/13

5:25 pm-11:10 pm

1 stop5h 45m

$312

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Wed 4/8

12:30 pm-8:25 pm

2 stops7h 55m

Buffalo

Wed 4/15

9:25 am-6:30 pm

2 stops9h 05m

$333

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Fri 8/21

6:10 am-11:10 am

1 stop5h 00m

Buffalo

Mon 8/24

11:25 am-4:25 pm

1 stop5h 00m

$339

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Thu 4/9

8:35 am-3:25 pm

2 stops6h 50m

Buffalo

Thu 4/16

4:00 pm-8:25 pm

1 stop4h 25m

$353

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Mon 3/30

2:00 pm-5:35 pm

1 stop3h 35m

Buffalo

Mon 4/6

5:55 pm-11:55 pm

1 stop6h 00m

$367

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Fri 5/22

8:35 am-6:10 pm

2 stops9h 35m

Buffalo

Sun 5/24

4:30 pm-10:50 pm

1 stop6h 20m

$374

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Thu 5/14

4:07 pm-8:47 am

1 stop16h 40m

Buffalo

Fri 5/22

11:55 am-9:08 am

1 stop21h 13m

$386
Cheapest one-way

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Wed 4/22

11:50 am-11:40 am

2 stops23h 50m

$129

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/11

Showing 1-10 of 19 resultsSorted by cheapest first
1
2

Compare providers for flights from Islip to Buffalo

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Islip to Buffalo in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Islip, New York-Buffalo flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Islip, New York-Buffalo flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Islip, New York-Buffalo flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Islip, New York-Buffalo flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Islip, New York-Buffalo flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Islip to Buffalo

Have a flexible travel schedule? Discover the best time to fly to Buffalo from Islip with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

What is the cheapest month to book a flight from Islip, New York to Buffalo?

Currently, December is the cheapest month in which you can book a flight from Islip, New York to Buffalo (average of $68). Flying from Islip, New York to Buffalo in February is currently the most expensive (average of $114). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Buffalo

Get insights into the airlines that provide service to Buffalo. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Buffalo. Reviews last updated March 13, 2026.
Read through reviews of airlines operating flights from Islip to Buffalo, such as Southwest. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,319 reviews

Boarding

8.1

Entertainment

7.5

Crew

8.6

Comfort

8.0

Overall

8.0

Food

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

KOA - HNL

pretty smooth and fast service ever, that flight is very helpful each and everyone for price and also fright for free..
Southwest
8.0
Very good
4,319 reviews
Southwest
8.0
Very good
4,319 reviews

Boarding

8.1

Entertainment

7.5

Crew

8.6

Comfort

8.0

Overall

8.0

Food

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

KOA - HNL

pretty smooth and fast service ever, that flight is very helpful each and everyone for price and also fright for free..

Related info for your journey

Find useful and relevant information for your journey from Islip to Buffalo. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Islip, New York to Buffalo?

    Airlines like Southwest fly from Islip, New York to Buffalo in about 4h. The time it takes to get you to your destination can typically vary by up to . There are 325 mi between Islip, New York and Buffalo.

  • What is the cheapest airline to fly from Islip, New York to Buffalo round-trip?

    Cheapflights users have booked flights from Islip, New York to Buffalo round-trip from $183.

  • Can I find deals for flights from Islip to Buffalo that include hotel bookings?

    Yes. In addition to deals on Islip to Buffalo flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Islip to Buffalo?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Islip to Buffalo.

  • Can I find deals for business class flights from Islip to Buffalo?

    Yes. Cheapflights offers flight deals from Islip to Buffalo by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Islip, New York to Buffalo?

    Currently, December is the cheapest month in which you can book a flight from Islip, New York to Buffalo (average of $68). Flying from Islip, New York to Buffalo in February is currently the most expensive (average of $114). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Buffalo?

Book flights to Buffalo if you plan to visit one of these locations
Lockport
Cheektowaga
Batavia
Williamsville
Orchard Park
Eden
Amherst
West Seneca

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from Islip to Buffalo

Discover the top airline that operate flights from Islip to Buffalo. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 13, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$183Average$351FlexibilityNo cancel feeOn-time63%

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