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$98+ 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 8/24. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — BUF
Aug 16 — Aug 231
Sun 8/16
Sun 8/23
1 adult, Economy
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Find cheap flights from Islip to Buffalo with Cheapflights

1. Tell us where you want to go

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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 July 17, 2026.

This Southwest deal was found by Cheapflights users on 7/15. 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 9/122:00 pm
ISP
-
BUF
1 stop6h 30m
Southwest
Mon 9/145:40 am
BUF
-
ISP
1 stop4h 00m
Southwest
Deal found 7/15$195
This Southwest deal was found by Cheapflights users on 7/15. 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 11/146:00 am
ISP
-
BUF
1 stop7h 30m
Southwest
Mon 11/1612:45 pm
BUF
-
ISP
1 stop3h 35m
Southwest
Deal found 7/15$200
This Frontier deal was found by Cheapflights users on 7/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2910:57 am
ISP
-
BUF
1 stop7h 12m
Frontier
Tue 9/19:29 pm
BUF
-
ISP
1 stop12h 24m
Frontier
Deal found 7/14$231
This Frontier deal was found by Cheapflights users on 7/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2810:57 am
ISP
-
BUF
1 stop7h 12m
Frontier
Sun 8/309:29 pm
BUF
-
ISP
1 stop12h 24m
Frontier
Deal found 7/15$242
This Southwest deal was found by Cheapflights users on 7/13. 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 9/265:30 am
ISP
-
BUF
1 stop4h 25m
Southwest
Sat 9/263:30 pm
BUF
-
ISP
1 stop5h 15m
Southwest
Deal found 7/13$246
This Southwest deal was found by Cheapflights users on 7/14. 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 8/116:05 am
ISP
-
BUF
1 stop6h 25m
Southwest
Tue 8/188:55 am
BUF
-
ISP
1 stop3h 15m
Southwest
Deal found 7/14$254
This Southwest deal was found by Cheapflights users on 7/12. 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 8/712:35 pm
ISP
-
BUF
2 stops9h 40m
Southwest
Thu 8/135:40 am
BUF
-
ISP
1 stop4h 00m
Southwest
Deal found 7/12$259
This Southwest deal was found by Cheapflights users on 7/14. 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.
Wed 9/166:05 am
ISP
-
BUF
1 stop6h 25m
Southwest
Sun 9/276:05 am
BUF
-
ISP
1 stop6h 00m
Southwest
Deal found 7/14$270
This Southwest deal was found by Cheapflights users on 7/16. 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.
Wed 8/196:05 am
ISP
-
BUF
1 stop6h 25m
Southwest
Sat 8/228:50 am
BUF
-
ISP
1 stop3h 15m
Southwest
Deal found 7/16$276

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 July 17, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$195
(Southwest)

One-way from

$98
(Southwest)

Popular in

January

Cheapest in

February

Average price

$212
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. 4% potential increase in price ($10 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 July 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 July 17, 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

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Sat 9/12

2:00 pm-8:30 pm

1 stop6h 30m

Buffalo

Mon 9/14

5:40 am-9:40 am

1 stop4h 00m

$195
Quickest round-trip

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Wed 10/7

9:40 am-3:15 pm

1 stop5h 35m

Buffalo

Sat 10/10

7:20 am-11:55 am

1 stop4h 35m

$195

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Sat 11/14

6:00 am-1:30 pm

1 stop7h 30m

Buffalo

Mon 11/16

12:45 pm-4:20 pm

1 stop3h 35m

$200

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Mon 8/31

10:57 am-6:09 pm

1 stop7h 12m

Buffalo

Tue 9/1

9:29 pm-9:53 am

1 stop12h 24m

$231

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Sat 8/29

10:57 am-6:09 pm

1 stop7h 12m

Buffalo

Tue 9/1

9:29 pm-9:53 am

1 stop12h 24m

$231

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Fri 8/28

10:57 am-6:09 pm

1 stop7h 12m

Buffalo

Sun 8/30

9:29 pm-9:53 am

1 stop12h 24m

$242

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Wed 9/16

6:05 am-12:30 pm

1 stop6h 25m

Buffalo

Sun 9/27

6:05 am-12:05 pm

1 stop6h 00m

$270

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Wed 8/19

12:55 pm-5:45 pm

1 stop4h 50m

Buffalo

Sat 8/22

7:50 am-2:30 pm

2 stops6h 40m

$281

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Tue 9/8

6:05 am-12:30 pm

1 stop6h 25m

Buffalo

Fri 9/18

5:40 am-9:40 am

1 stop4h 00m

$303
Cheapest one-way

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Sat 11/7

6:00 am-1:30 pm

1 stop7h 30m

$103

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/16

Showing 1-10 of 17 resultsSorted by cheapest first
1
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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 July.
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.

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 and Frontier fly from Islip, New York to Buffalo in about 6h 30m. The time it takes to get you to your destination can typically vary by up to 42m. There are 325 mi between Islip, New York and Buffalo. This flight may include one or multiple stops.

  • 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.

See more FAQs

Traveling to a place near Buffalo?

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

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