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Islip

$217+ 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 12/18. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — ISP
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Cheap 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 December 12, 2025.

This Southwest deal was found by Cheapflights users on 12/11. 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.
Mon 12/226:05 pmBUF - ISP
1 stop5h 50mSouthwest
Thu 1/15:40 amISP - BUF
1 stop6h 25mSouthwest
Deal found 12/11$443
This Southwest deal was found by Cheapflights users on 12/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/236:55 amBUF - ISP
1 stop7h 05mSouthwest
Fri 12/265:50 pmISP - BUF
1 stop6h 15mSouthwest
Deal found 12/10$489
This Southwest deal was found by Cheapflights users on 12/11. 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 12/236:55 amBUF - ISP
1 stop7h 05mSouthwest
Sun 12/285:50 pmISP - BUF
1 stop6h 15mSouthwest
Deal found 12/11$518
This Southwest deal was found by Cheapflights users on 12/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/117:40 amBUF - ISP
1 stop4h 35mSouthwest
Thu 12/183:25 pmISP - BUF
1 stop6h 35mSouthwest
Deal found 12/10$596

Find 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 December 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$277
(Frontier)

One-way from

$217
(Kiwi.com)

Popular in

August

Cheapest in

April

Average price

$197
Provider with most accurate pricing for Buffalo-Islip Long Island flight deals.
Search Deals
Provider most trusted by Cheapflights users for Buffalo-Islip Long Island flights.
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From Buffalo to Islip Long Island
Search Deals
One-way flight from Buffalo to Islip Long Island
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($9 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($2 potential savings vs. average RT price).
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Average for round-trip flights in December 2025
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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 December 12, 2025.
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

Thu 1/15

10:11 am-7:50 pm

1 stop9h 39m

Islip Long Island

Sun 1/18

9:52 am-8:03 pm

1 stop10h 11m

$277

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Thu 4/23

5:45 am-11:50 am

1 stop6h 05m

Islip Long Island

Mon 4/27

12:30 pm-4:40 pm

1 stop4h 10m

$306

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Fri 1/2

6:55 am-2:00 pm

1 stop7h 05m

Islip Long Island

Fri 1/9

6:00 am-12:30 pm

1 stop6h 30m

$397

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Fri 1/2

6:55 am-2:00 pm

1 stop7h 05m

Islip Long Island

Mon 1/5

5:30 pm-11:40 pm

1 stop6h 10m

$423

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Mon 12/22

6:05 pm-11:55 pm

1 stop5h 50m

Islip Long Island

Thu 1/1

5:40 am-12:05 pm

1 stop6h 25m

$443

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Thu 12/18

2:07 pm-12:42 pm

1 stop22h 35m

$217

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Thu 12/18

12:40 pm-11:50 pm

2 stops11h 10m

$250

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Wed 12/17

3:40 pm-10:05 pm

1 stop6h 25m

$322

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Thu 12/18

2:07 pm-1:45 pm

3 stops23h 38m

$325

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Sun 12/21

8:12 am-6:45 pm

1 stop10h 33m

$477

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

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 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 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, March 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.

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

Find hourly flight availability from Buffalo to Islip. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 12, 2025.

One of the essential ways to save on airfare from Buffalo to Islip, New York is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the afternoon could potentially save you up to 33% on airfare.

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 December 12, 2025.
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
7.9
Good
4,253 reviews

Entertainment

7.5

Crew

8.6

Boarding

8.1

Overall

7.9

Food

7.0

Comfort

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
7.9
Good
4,253 reviews
Southwest
7.9
Good
4,253 reviews

Entertainment

7.5

Crew

8.6

Boarding

8.1

Overall

7.9

Food

7.0

Comfort

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. Frontier provides one of the quickest options available for as low as $306. Buffalo and Islip, New York are separated by a distance of 325 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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, March 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 December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$199Average$336FlexibilityNo cancel feeOn-time63%

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