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$108+ 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 9/3. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — BUF
Aug 22 — Aug 291
Sat 8/22
Sat 8/29
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 23, 2026.

This Southwest deal was found by Cheapflights users on 7/20. 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 7/20$200
This Southwest deal was found by Cheapflights users on 7/18. 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 11/34:00 pm
ISP
-
BUF
1 stop5h 50m
Southwest
Sat 11/710:10 am
BUF
-
ISP
1 stop4h 45m
Southwest
Deal found 7/18$215
This Southwest deal was found by Cheapflights users on 7/22. 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 10/163:10 pm
ISP
-
BUF
1 stop3h 30m
Southwest
Mon 10/199:40 am
BUF
-
ISP
1 stop4h 50m
Southwest
Deal found 7/22$224
This Expedia deal was found by Cheapflights users on 7/19. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/237:09 pm
ISP
-
BUF
1 stop23h 00m
Frontier
Thu 8/279:29 pm
BUF
-
ISP
1 stop12h 24m
Frontier
Deal found 7/19$242
This Southwest deal was found by Cheapflights users on 7/19. 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 8/1810:55 am
ISP
-
BUF
1 stop3h 25m
Southwest
Mon 8/243:55 pm
BUF
-
ISP
1 stop6h 10m
Southwest
Deal found 7/19$265
This Southwest deal was found by Cheapflights users on 7/18. 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 8/1511:55 am
ISP
-
BUF
1 stop9h 10m
Southwest
Tue 8/188:55 am
BUF
-
ISP
1 stop3h 15m
Southwest
Deal found 7/18$268
This Expedia deal was found by Cheapflights users on 7/21. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/112:00 pm
ISP
-
BUF
1 stop6h 17m
Multiple Airlines
Sun 9/1311:58 am
BUF
-
ISP
1 stop6h 53m
Multiple Airlines
Deal found 7/21$280
This Southwest deal was found by Cheapflights users on 7/21. 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 8/183:20 pm
ISP
-
BUF
1 stop5h 45m
Southwest
Tue 8/256:00 am
BUF
-
ISP
1 stop6h 10m
Southwest
Deal found 7/21$281

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 23, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$200
(Southwest)

One-way from

$108
(Southwest)

Popular in

August

Cheapest in

February

Average price

$211
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. 6% potential increase in price ($15 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($5 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 23, 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

Tue 11/3

6:00 am-3:10 pm

2 stops9h 10m

Buffalo

Sat 11/7

10:10 am-2:55 pm

1 stop4h 45m

$220

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Sat 11/14

6:00 am-4:00 pm

2 stops10h 00m

Buffalo

Mon 11/16

12:45 pm-4:20 pm

1 stop3h 35m

$235

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Sat 8/15

11:55 am-9:05 pm

1 stop9h 10m

Buffalo

Tue 8/18

8:55 am-12:10 pm

1 stop3h 15m

$268

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Tue 8/18

3:20 pm-9:05 pm

1 stop5h 45m

Buffalo

Tue 8/25

6:00 am-12:10 pm

1 stop6h 10m

$281
Quickest round-trip

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Tue 9/15

10:55 am-2:20 pm

1 stop3h 25m

Buffalo

Fri 9/18

5:40 am-9:40 am

1 stop4h 00m

$291

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Fri 9/11

1:15 pm-10:40 pm

2 stops9h 25m

Buffalo

Sun 9/13

9:40 am-3:55 pm

1 stop6h 15m

$301

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Tue 8/18

6:05 am-3:25 pm

2 stops9h 20m

Buffalo

Mon 8/24

3:55 pm-10:05 pm

1 stop6h 10m

$308
Cheapest one-way
Quickest one-way

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Thu 9/3

6:10 am-11:10 am

1 stop5h 00m

$108

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Fri 9/4

10:57 am-6:09 pm

1 stop7h 12m

$121

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Fri 9/4

12:35 pm-10:15 pm

2 stops9h 40m

$127

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/20

Showing 1-10 of 15 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 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 fly from Islip, New York to Buffalo in about 9h 10m. 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.

  • 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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