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$115+ 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 2 — Aug 91
Sat 8/2
Sat 8/9
1 adult, Economy
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Cheap 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 28, 2025.

Round-trip from

$203
(Southwest)

One-way from

$115
(Frontier)

Popular in

December

Cheapest in

September

Average price

$339
From Islip Long Island to Buffalo
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One-way flight from Islip Long Island to Buffalo
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Highest demand for flights based on searches. 26% potential increase in price ($135 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find 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 28, 2025.

This Southwest deal was found by Cheapflights users on 7/27. 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 9/263:05 pmISP - BUF
1 stop4h 30mSouthwest
Sun 9/288:30 amBUF - ISP
1 stop4h 00mSouthwest
Deal found 7/27$203
This Frontier deal was found by Cheapflights users on 7/27. 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 8/168:37 pmISP - BUF
1 stop12h 15mFrontier
Thu 8/218:18 pmBUF - ISP
1 stop12h 55mFrontier
Deal found 7/27$208
This United deal was found by Cheapflights users on 7/27. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/282:19 pmISP - BUF
2 stops19h 26mMultiple Airlines
Sat 8/26:00 amBUF - ISP
2 stops28h 58mMultiple Airlines
Deal found 7/27$1,125

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 28, 2025.
Use the filters below to find and compare flights from Islip to Buffalo that are best for you.

Fly from

Islip

Fly to

Buffalo

Route

Depart

Return

Price

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Fri 9/26

3:05 pm-7:35 pm

1 stop4h 30m

Buffalo

Sun 9/28

8:30 am-12:30 pm

1 stop4h 00m

$203

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Sat 8/16

8:37 pm-8:52 am

1 stop12h 15m

Buffalo

Thu 8/21

8:18 pm-9:13 am

1 stop12h 55m

$208

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Mon 8/18

7:30 am-4:55 pm

2 stops9h 25m

Buffalo

Mon 8/18

7:45 pm-10:58 am

2 stops15h 13m

$1,137

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Sun 8/24

6:05 am-5:52 pm

1 stop11h 47m

$115

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Sat 9/6

11:35 am-10:20 pm

1 stop10h 45m

$153

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Fri 9/19

6:00 am-12:00 pm

1 stop6h 00m

$189

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

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, January is the cheapest month in which you can book a flight from Islip, New York to Buffalo (average of $256). Flying from Islip, New York to Buffalo in December is currently the most expensive (average of $337). 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.

What is the cheapest time of day to fly from ISP to BUF?

Find hourly flight availability from Islip to Buffalo. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 28, 2025.

It’s typically best to fly out from Islip, New York to Buffalo in the morning. Doing so could potentially save you 15% on the flight price compared to flying at noon, which is usually more expensive.

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 July 28, 2025.
Read through reviews of airlines operating flights from Islip to Buffalo, such as Southwest, JetBlue, and Frontier. 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
4,238 reviews

Food

7.0

Overall

8.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Southwest
8.0
Very good
4,238 reviews
Southwest
8.0
Very good
4,238 reviews

Food

7.0

Overall

8.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
JetBlue
7.3
Good
2,914 reviews
Southwest
8.0
Very good
4,238 reviews

Food

7.0

Overall

8.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Frontier
5.9
Fair
3,238 reviews
Southwest
8.0
Very good
4,238 reviews

Food

7.0

Overall

8.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.

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.

  • What are the cheapest airlines flying from Islip, New York to Buffalo round-trip?

    Cheapflights users have booked flights from Islip, New York to Buffalo round-trip from $203. Another airline that can offer you cheap pricing is Frontier. These flights start at 45% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Islip, New York to Buffalo one-way?

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $115. Users have also found prices from $153 and $189 on JetBlue and Southwest, respectively.

  • 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, January is the cheapest month in which you can book a flight from Islip, New York to Buffalo (average of $256). Flying from Islip, New York to Buffalo in December is currently the most expensive (average of $337). 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
Orchard Park
Batavia
Williamsville
Eden
Amherst
West Seneca

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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 July 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$213Average$388FlexibilityNo cancel feeOn-time63%

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