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$166+ Cheap flights from Buffalo to Islip, NY (BUF - ISP)

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 5/1. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — ISP
Feb 13 — Feb 201
Fri 2/13
Fri 2/20
1 adult, Economy
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Cheap flight deals from Buffalo to Islip

Discover tips and strategies to find the most affordable flight options for your journey from Buffalo (BUF) to Islip (ISP). 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 January 14, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$187
(Southwest)

One-way from

$166
(Southwest)

Popular in

August

Cheapest in

January

Average price

$157
Provider with most accurate pricing for Buffalo-Islip Long Island flight deals.
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Provider most trusted by Cheapflights users for Buffalo-Islip Long Island flights.
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From Buffalo to Islip Long Island
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One-way flight from Buffalo to Islip Long Island
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Highest demand for flights based on searches. 6% potential increase in price ($12 potential increase over avg. RT price).
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Cheapest flight prices on average. 0% potential price decrease ($2 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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Find flight deals from Buffalo to Islip

Cheapest flights from Buffalo to Islip
Explore the most affordable flight options available from Buffalo to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 14, 2026.

This Southwest deal was found by Cheapflights users on 1/14. 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.
Wed 2/255:50 am
BUF
-
ISP
1 stop6h 05m
Southwest
Wed 3/46:00 am
ISP
-
BUF
1 stop6h 30m
Southwest
Deal found 1/14$187
This Booking.com deal was found by Cheapflights users on 1/14. 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.
Fri 1/168:58 pm
BUF
-
ISP
1 stop25h 48m
Frontier
Sun 1/181:42 pm
ISP
-
BUF
1 stop19h 39m
Frontier
Deal found 1/14$378
This Southwest deal was found by Cheapflights users on 1/12. 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.
Fri 6/1211:00 am
BUF
-
ISP
1 stop3h 30m
Southwest
Sun 6/146:00 am
ISP
-
BUF
1 stop5h 45m
Southwest
Deal found 1/12$387
This Southwest deal was found by Cheapflights users on 1/14. 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 1/168:40 am
BUF
-
ISP
1 stop3h 15m
Southwest
Sat 1/173:35 pm
ISP
-
BUF
1 stop6h 15m
Southwest
Deal found 1/14$643
This Expedia deal was found by Cheapflights users on 1/13. 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.
Wed 1/2810:00 am
BUF
-
ISP
1 stop6h 10m
Multiple Airlines
Sun 2/112:30 pm
ISP
-
BUF
1 stop6h 17m
Multiple Airlines
Deal found 1/13$720

Cheapflights Fare Finder

 
Customize your flight search to find flights from Buffalo to Islip 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 January 14, 2026.
Use the filters below to find and compare flights from Buffalo to Islip that are best for you.

Fly from

Buffalo

Fly to

Islip

Route

Depart

Return

Price

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Wed 2/25

5:50 am-11:55 am

1 stop6h 05m

Islip Long Island

Wed 3/4

6:00 am-12:30 pm

1 stop6h 30m

$187

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Fri 6/12

11:00 am-2:30 pm

1 stop3h 30m

Islip Long Island

Sun 6/14

6:00 am-11:45 am

1 stop5h 45m

$387

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Wed 1/28

10:00 am-4:10 pm

1 stop6h 10m

Islip Long Island

Sun 2/1

12:30 pm-6:47 pm

1 stop6h 17m

$720

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Fri 5/1

6:15 am-4:30 pm

2 stops10h 15m

$166

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/14

Compare providers for flights from Buffalo to Islip

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 Buffalo to Islip in January.
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 Buffalo-Islip, New York flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Buffalo-Islip, New York flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Buffalo-Islip, New York flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Buffalo-Islip, New York 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 Buffalo-Islip, New York 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 Buffalo to Islip

Have a flexible travel schedule? Discover the best time to fly to Islip from Buffalo 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 Buffalo to Islip

What is the cheapest month to book a flight from Buffalo to Islip, New York?

Currently, January is the cheapest month in which you can book a flight from Buffalo to Islip, New York (average of $58). Flying from Buffalo to Islip, New York in June is currently the most expensive (average of $93). 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.

Reviews of airlines servicing Islip

Get insights into the airlines that provide service to Islip. 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 Islip. Reviews last updated January 14, 2026.
Get a feel of what it's like to fly with Southwest from Buffalo to Islip by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,258 reviews

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Crew

8.6

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
4,258 reviews
Southwest
8.0
Very good
4,258 reviews

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Crew

8.6

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 Buffalo to Islip. 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 Buffalo to Islip, New York?

    A quick flight from Buffalo to Islip, New York can take about 6h 05m. Southwest provides one of the quickest options available for as low as $187. Buffalo and Islip, New York are separated by a distance of 325 mi.

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

    Southwest, at $199, was found to be the cheapest airline from Buffalo to Islip, New York..

  • Can I find deals for flights from Buffalo to Islip that include hotel bookings?

    Yes. In addition to deals on Buffalo to Islip flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Buffalo to Islip?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Buffalo to Islip.

  • Can I find deals for business class flights from Buffalo to Islip?

    Yes. Cheapflights offers flight deals from Buffalo to Islip 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 Buffalo to Islip, New York?

    Currently, January is the cheapest month in which you can book a flight from Buffalo to Islip, New York (average of $58). Flying from Buffalo to Islip, New York in June is currently the most expensive (average of $93). 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
Riverhead

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Top airline flying from Buffalo to Islip

Discover the top airline that operate flights from Buffalo to Islip. 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 January 14, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$199Average$335FlexibilityNo cancel feeOn-time63%

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