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$78+ 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 6/6. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — BUF
May 20 — May 271
Tue 5/20
Tue 5/27
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 May 15, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$156
(Frontier)

One-way from

$78
(Frontier)

Popular in

December

Cheapest in

September

Average price

$356
Provider with most accurate pricing for Islip Long Island-Buffalo flight deals.
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Provider most trusted by Cheapflights users for Islip Long Island-Buffalo flights.
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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. 27% potential increase in price ($136 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in May 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 May 15, 2025.

This Frontier deal was found by Cheapflights users on 5/15. 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 6/68:51 amISP - BUF
1 stop8h 49mFrontier
Sat 6/78:31 pmBUF - ISP
1 stop11h 20mFrontier
Deal found 5/15$156
This Southwest deal was found by Cheapflights users on 5/15. 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.
Sun 11/25:50 amISP - BUF
1 stop6h 10mSouthwest
Mon 11/37:55 amBUF - ISP
1 stop4h 55mSouthwest
Deal found 5/15$208
This JetBlue deal was found by Cheapflights users on 5/15. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/3012:59 pmISP - BUF
1 stop6h 17mJetBlue
Tue 6/37:05 amBUF - ISP
1 stop9h 45mJetBlue
Deal found 5/15$374

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 May 15, 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 6/6

8:51 am-5:40 pm

1 stop8h 49m

Buffalo

Sat 6/7

8:31 pm-7:51 am

1 stop11h 20m

$156

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Fri 6/6

5:05 am-2:55 pm

2 stops9h 50m

Buffalo

Sun 6/8

5:55 am-11:45 am

1 stop5h 50m

$306

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Fri 5/30

12:59 pm-7:16 pm

1 stop6h 17m

Buffalo

Tue 6/3

7:05 am-4:50 pm

1 stop9h 45m

$374

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Fri 6/6

8:51 am-5:40 pm

1 stop8h 49m

$78

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Fri 6/6

5:05 am-2:55 pm

2 stops9h 50m

$194

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Mon 7/14

11:40 am-10:29 pm

1 stop10h 49m

$333

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Fri 6/6

10:44 am-10:44 am

3 stops48h 00m

$365

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/15

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 May.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 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 Expedia the most. Expedia 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, 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 May 15, 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.

Rainfall in Buffalo by month

Plan your trip to Buffalo by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Buffalo ranges from 2.5 - 4.0 inches per month. November is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Buffalo when rainfall is around 2.5 in.

Temperature in Buffalo by month

Plan your trip to Buffalo by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Buffalo, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 71.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 24.8 F).

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 May 15, 2025.
To help decide which airline to fly from Islip to Buffalo, see what other customers have to say about Southwest, JetBlue and Frontier. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,291 reviews

Entertainment

7.6

Food

7.1

Crew

8.6

Comfort

8.0

Overall

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!
Southwest
8.0
Very good
4,291 reviews
Southwest
8.0
Very good
4,291 reviews

Entertainment

7.6

Food

7.1

Crew

8.6

Comfort

8.0

Overall

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!
JetBlue
7.3
Good
2,926 reviews
Southwest
8.0
Very good
4,291 reviews

Entertainment

7.6

Food

7.1

Crew

8.6

Comfort

8.0

Overall

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!
Frontier
6.0
Okay
3,285 reviews
Southwest
8.0
Very good
4,291 reviews

Entertainment

7.6

Food

7.1

Crew

8.6

Comfort

8.0

Overall

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!

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 $156. Other airlines that can offer you cheap pricing are Southwest, from $306, and JetBlue, from $374. These flights start at 57% 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 $78. Users have also found prices from $194 and $333 on Southwest and JetBlue, 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 Islip?

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

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Alternative routes for Islip to Buffalo

See prices for flight routes from nearby airports that may be better suited for you.
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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 May 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$254Average$467FlexibilityNo cancel feeOn-time63%

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