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$106+ 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 12/19. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — BUF
Jan 8 — Jan 151
Thu 1/8
Thu 1/15
1 adult, Economy
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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 December 9, 2025.

This Priceline deal was found by Cheapflights users on 12/8. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/191:27 pmISP - BUF
1 stop7h 13mFrontier
Mon 12/2210:43 amBUF - ISP
1 stop8h 57mFrontier
Deal found 12/8$238
This Booking.com deal was found by Cheapflights users on 12/7. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/206:40 pmISP - BUF
1 stop17h 56mFrontier
Sun 12/217:58 pmBUF - ISP
1 stop28h 01mFrontier
Deal found 12/7$281
This Southwest deal was found by Cheapflights users on 12/8. 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 12/195:50 pmISP - BUF
1 stop6h 15mSouthwest
Mon 12/226:05 pmBUF - ISP
1 stop5h 50mSouthwest
Deal found 12/8$453
This Priceline deal was found by Cheapflights users on 12/7. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/911:50 amISP - BUF
1 stop10h 22mMultiple Airlines
Mon 12/2210:43 amBUF - ISP
1 stop8h 57mMultiple Airlines
Deal found 12/7$483
This Southwest deal was found by Cheapflights users on 12/8. 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 12/1410:55 amISP - BUF
1 stop5h 25mSouthwest
Tue 12/167:40 amBUF - ISP
1 stop4h 35mSouthwest
Deal found 12/8$489
This Kiwi.com deal was found by Cheapflights users on 12/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/98:29 pmISP - BUF
2 stops38h 41mFrontier
Mon 12/2210:43 amBUF - ISP
1 stop8h 57mFrontier
Deal found 12/7$494
This Southwest deal was found by Cheapflights users on 12/7. 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 12/96:15 amISP - BUF
2 stops11h 20mSouthwest
Mon 12/226:05 pmBUF - ISP
1 stop5h 50mSouthwest
Deal found 12/7$565
This Kiwi.com deal was found by Cheapflights users on 12/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/228:35 pmISP - BUF
1 stop16h 17mFrontier
Fri 12/265:40 pmBUF - ISP
2 stops30h 19mFrontier
Deal found 12/7$634

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 December 9, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$173
(Gotogate)

One-way from

$106
(Frontier)

Popular in

March

Cheapest in

December

Average price

$202
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. 21% potential increase in price ($92 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($20 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 December 9, 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

Thu 1/22

7:43 pm-6:36 pm

1 stop22h 53m

Buffalo

Thu 1/29

7:59 pm-8:47 pm

1 stop24h 48m

$173

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Fri 12/19

1:27 pm-8:40 pm

1 stop7h 13m

Buffalo

Mon 12/22

10:43 am-7:40 pm

1 stop8h 57m

$238

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Sun 1/4

8:24 pm-9:08 pm

1 stop24h 44m

Buffalo

Sun 1/11

9:08 am-7:45 pm

1 stop10h 37m

$272

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Sat 12/20

6:40 pm-12:36 pm

1 stop17h 56m

Buffalo

Sun 12/21

7:58 pm-11:59 pm

1 stop28h 01m

$281

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Fri 1/30

12:40 pm-5:05 pm

1 stop4h 25m

Buffalo

Sun 2/1

7:05 am-1:30 pm

1 stop6h 25m

$329

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Sat 1/10

10:00 am-6:49 pm

1 stop8h 49m

Buffalo

Sun 1/11

9:08 am-7:45 pm

1 stop10h 37m

$373

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Sat 12/20

6:05 pm-12:30 am

1 stop6h 25m

Buffalo

Sun 12/21

5:30 am-11:55 am

1 stop6h 25m

$453

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Fri 12/19

5:50 pm-12:05 am

1 stop6h 15m

Buffalo

Mon 12/22

6:05 pm-11:55 pm

1 stop5h 50m

$453

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Fri 12/19

1:27 pm-8:40 pm

1 stop7h 13m

$106

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Fri 1/23

12:25 pm-8:18 pm

1 stop7h 53m

$192

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/8

Showing 1-10 of 15 results
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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Islip, New York-Buffalo flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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, February is the cheapest month in which you can book a flight from Islip, New York to Buffalo (average of $65). Flying from Islip, New York to Buffalo in June is currently the most expensive (average of $116). 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 December 9, 2025.

It’s typically best to fly out from Islip, New York to Buffalo at noon. Doing so could potentially save you 65% on the flight price compared to flying in the evening, 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 December 9, 2025.
Read through reviews of airlines operating flights from Islip to Buffalo, such as Southwest. 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
4,254 reviews

Comfort

8.0

Food

7.0

Crew

8.6

Entertainment

7.5

Boarding

8.1

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southwest
8.0
Very good
4,254 reviews
Southwest
8.0
Very good
4,254 reviews

Comfort

8.0

Food

7.0

Crew

8.6

Entertainment

7.5

Boarding

8.1

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

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 Frontier fly from Islip, New York to Buffalo in about 22h 53m. 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.

  • What is the cheapest airline to fly from Islip, New York to Buffalo round-trip?

    Cheapflights users have booked flights from Islip, New York to Buffalo round-trip from $183. This flight start at 45% lower than the current average price 3 months from now.

  • 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, February is the cheapest month in which you can book a flight from Islip, New York to Buffalo (average of $65). Flying from Islip, New York to Buffalo in June is currently the most expensive (average of $116). 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
Lockport
Cheektowaga
Orchard Park
Batavia
Williamsville
Eden
Amherst
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 December 9, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$183Average$351FlexibilityNo cancel feeOn-time63%

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