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Islip

$121+ 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 6/7. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — ISP
Jun 4 — Jun 111
Thu 6/4
Thu 6/11
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 May 5, 2026.

This Kiwi.com deal was found by Cheapflights users on 4/30. 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.
Thu 6/119:02 pm
BUF
-
ISP
1 stop23h 55m
Frontier
Mon 6/229:52 pm
ISP
-
BUF
1 stop21h 20m
Frontier
Deal found 4/30$309
This Expedia deal was found by Cheapflights users on 4/30. 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.
Mon 5/411:19 am
BUF
-
ISP
1 stop23h 41m
Frontier
Sun 5/1011:12 am
ISP
-
BUF
1 stop7h 34m
Frontier
Deal found 4/30$320
This Southwest deal was found by Cheapflights users on 5/2. 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 6/112:40 pm
BUF
-
ISP
1 stop3h 50m
Southwest
Thu 6/45:50 pm
ISP
-
BUF
1 stop6h 20m
Southwest
Deal found 5/2$327
This Southwest deal was found by Cheapflights users on 5/2. 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 6/14:00 pm
BUF
-
ISP
1 stop4h 25m
Southwest
Fri 6/55:50 pm
ISP
-
BUF
1 stop6h 20m
Southwest
Deal found 5/2$334
This Kiwi.com deal was found by Cheapflights users on 5/1. 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 6/152:50 pm
BUF
-
ISP
2 stops25h 06m
Frontier
Mon 6/229:52 pm
ISP
-
BUF
1 stop21h 20m
Frontier
Deal found 5/1$337
This Southwest deal was found by Cheapflights users on 5/3. 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 5/196:05 am
BUF
-
ISP
1 stop5h 50m
Southwest
Sat 5/234:40 pm
ISP
-
BUF
1 stop4h 00m
Southwest
Deal found 5/3$341
This Kiwi.com deal was found by Cheapflights users on 4/30. 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.
Fri 5/157:31 pm
BUF
-
ISP
1 stop14h 34m
Multiple Airlines
Tue 5/195:27 pm
ISP
-
BUF
2 stops20h 27m
Multiple Airlines
Deal found 4/30$347
This Kiwi.com deal was found by Cheapflights users on 5/2. 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 6/17:52 pm
BUF
-
ISP
2 stops20h 55m
Multiple Airlines
Fri 6/511:00 am
ISP
-
BUF
1 stop7h 59m
Multiple Airlines
Deal found 5/2$356
This Southwest deal was found by Cheapflights users on 4/30. 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 5/155:20 pm
BUF
-
ISP
1 stop6h 10m
Southwest
Tue 5/194:10 pm
ISP
-
BUF
1 stop6h 05m
Southwest
Deal found 4/30$369

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 May 5, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$309
(Kiwi.com)

One-way from

$121
(Frontier)

Popular in

March

Cheapest in

January

Average price

$199
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.
Search Deals
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 ($4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2026
Search Deals

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 May 5, 2026.
Use the filters below to find and compare flights from Buffalo to Islip that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Mon 6/15

7:57 pm-3:56 pm

1 stop19h 59m

Islip Long Island

Mon 6/22

9:52 pm-7:12 pm

1 stop21h 20m

$309

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Mon 6/1

12:40 pm-4:30 pm

1 stop3h 50m

Islip Long Island

Thu 6/4

5:50 pm-12:10 am

1 stop6h 20m

$327
Quickest round-trip

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Tue 5/19

6:05 am-11:55 am

1 stop5h 50m

Islip Long Island

Sat 5/23

4:40 pm-8:40 pm

1 stop4h 00m

$341

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Fri 5/15

7:31 pm-10:05 am

1 stop14h 34m

Islip Long Island

Tue 5/19

5:27 pm-1:54 pm

2 stops20h 27m

$347

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Fri 5/15

5:20 pm-11:30 pm

1 stop6h 10m

Islip Long Island

Tue 5/19

4:10 pm-10:15 pm

1 stop6h 05m

$369

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Fri 7/10

5:55 pm-11:35 pm

1 stop5h 40m

Islip Long Island

Sun 7/12

6:00 am-11:45 am

1 stop5h 45m

$387

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Thu 6/11

2:50 pm-11:40 pm

2 stops8h 50m

Islip Long Island

Mon 6/22

5:20 am-2:15 pm

2 stops8h 55m

$407
Cheapest one-way

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Sun 6/7

8:49 pm-10:05 am

1 stop13h 16m

$121
Quickest one-way

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Mon 8/17

3:55 pm-10:05 pm

1 stop6h 10m

$179

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/2

Sorted by cheapest first

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 May.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Buffalo-Islip, New York flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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.

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 3h 50m. Frontier provides one of the quickest options available for as low as $327. 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.

  • 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.

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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