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$132+ 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 7/26. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — BUF
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$214
(Southwest)

One-way from

$132
(JetBlue)

Popular in

December

Cheapest in

September

Average price

$254
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. 3% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This Southwest deal was found by Cheapflights users on 6/12. 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.
Sun 9/75:45 pmISP - BUF
1 stop6h 20mSouthwest
Wed 9/1012:00 pmBUF - ISP
1 stop3h 10mSouthwest
Deal found 6/12$214
This FlightHub deal was found by Cheapflights users on 6/10. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/168:37 pmISP - BUF
1 stop12h 15mFrontier
Thu 7/179:07 pmBUF - ISP
1 stop22h 35mFrontier
Deal found 6/10$355
This JetBlue deal was found by Cheapflights users on 6/10. 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.
Tue 6/2410:25 amISP - BUF
1 stop7h 17mJetBlue
Tue 7/17:00 amBUF - ISP
1 stop6h 43mJetBlue
Deal found 6/10$601
This JetBlue Airways deal was found by Cheapflights users on 6/9. 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 Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/54:33 pmISP - BUF
1 stop4h 52mMultiple Airlines
Mon 12/88:46 pmBUF - ISP
1 stop15h 34mMultiple Airlines
Deal found 6/9$650

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 June 12, 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

Sun 9/7

5:45 pm-12:05 am

1 stop6h 20m

Buffalo

Wed 9/10

12:00 pm-3:10 pm

1 stop3h 10m

$214

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Wed 7/16

8:37 pm-8:52 am

1 stop12h 15m

Buffalo

Thu 7/17

9:07 pm-7:42 pm

1 stop22h 35m

$355

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Tue 6/24

10:25 am-5:42 pm

1 stop7h 17m

Buffalo

Tue 7/1

7:00 am-1:43 pm

1 stop6h 43m

$601

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Wed 6/25

2:55 pm-10:50 am

2 stops19h 55m

Buffalo

Sun 6/29

11:47 am-3:19 pm

3 stops27h 32m

$958

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Sat 7/26

11:40 am-10:30 pm

1 stop10h 50m

$132

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Sun 6/15

8:21 pm-7:50 am

1 stop11h 29m

$135

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Tue 6/24

4:40 pm-10:55 pm

1 stop6h 15m

$149

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

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 June 12, 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 June 12, 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
4,287 reviews

Overall

8.0

Entertainment

7.6

Comfort

8.0

Food

7.1

Boarding

8.2

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Southwest
8.0
Very good
4,287 reviews
Southwest
8.0
Very good
4,287 reviews

Overall

8.0

Entertainment

7.6

Comfort

8.0

Food

7.1

Boarding

8.2

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
JetBlue
7.3
Good
2,925 reviews
Southwest
8.0
Very good
4,287 reviews

Overall

8.0

Entertainment

7.6

Comfort

8.0

Food

7.1

Boarding

8.2

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Frontier
6.0
Okay
3,295 reviews
Southwest
8.0
Very good
4,287 reviews

Overall

8.0

Entertainment

7.6

Comfort

8.0

Food

7.1

Boarding

8.2

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

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 $214. Other airlines that can offer you cheap pricing are Frontier, from $355, and JetBlue, from $601. These flights start at 41% 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 JetBlue. According to our data, you can fly for as low as $132. Users have also found prices from $135 and $149 on Frontier 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 Islip?

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

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Alternative routes for Islip to Buffalo

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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$213Average$388FlexibilityNo cancel feeOn-time63%

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