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Islip

$144+ Cheap flights from Buffalo to Islip (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 11/26. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — ISP
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
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 September 17, 2025.

Round-trip from

$171
(Southwest)

One-way from

$144
(Southwest)

Popular in

November

Cheapest in

May

Average price

$240
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. 23% potential increase in price ($99 potential increase over avg. RT price).
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Cheapest flight prices on average. 9% potential price decrease ($31 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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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 September 17, 2025.

This Southwest deal was found by Cheapflights users on 9/16. 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 10/217:10 amBUF - ISP
1 stop5h 15mSouthwest
Sat 10/2511:55 amISP - BUF
1 stop4h 25mSouthwest
Deal found 9/16$171
This Booking.com deal was found by Cheapflights users on 9/16. 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.
Thu 10/27:41 pmBUF - ISP
1 stop14h 59mFrontier
Sat 10/45:05 pmISP - BUF
1 stop24h 22mFrontier
Deal found 9/16$172
This Booking.com deal was found by Cheapflights users on 9/16. 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 10/179:13 pmBUF - ISP
1 stop13h 24mFrontier
Sun 10/199:47 pmISP - BUF
1 stop22h 31mFrontier
Deal found 9/16$180
This Southwest deal was found by Cheapflights users on 9/16. 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 11/283:40 pmBUF - ISP
1 stop8h 10mSouthwest
Mon 12/15:50 pmISP - BUF
1 stop6h 15mSouthwest
Deal found 9/16$258
This Frontier deal was found by Cheapflights users on 9/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/238:19 pmBUF - ISP
2 stops12h 45mFrontier
Sun 10/269:47 pmISP - BUF
2 stops13h 32mFrontier
Deal found 9/15$285
This Southwest deal was found by Cheapflights users on 9/16. 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 10/35:45 pmBUF - ISP
1 stop6h 00mSouthwest
Mon 10/65:35 pmISP - BUF
1 stop3h 10mSouthwest
Deal found 9/16$301
This Southwest deal was found by Cheapflights users on 9/16. 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 10/25:45 amBUF - ISP
1 stop6h 05mSouthwest
Sun 10/512:55 pmISP - BUF
1 stop10h 15mSouthwest
Deal found 9/16$314
This Mytrip deal was found by Cheapflights users on 9/16. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/27:41 pmBUF - ISP
1 stop14h 59mFrontier
Sun 10/511:25 amISP - BUF
2 stops23h 57mFrontier
Deal found 9/16$329
This Booking.com deal was found by Cheapflights users on 9/16. 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 10/36:59 pmBUF - ISP
1 stop15h 56mFrontier
Sun 10/511:25 amISP - BUF
2 stops23h 57mFrontier
Deal found 9/16$331

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 September 17, 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

Tue 10/21

11:10 am-4:05 pm

1 stop4h 55m

Islip Long Island

Sat 10/25

6:05 am-3:15 pm

2 stops9h 10m

$176

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Fri 10/17

9:13 pm-10:37 am

1 stop13h 24m

Islip Long Island

Sun 10/19

9:47 pm-8:18 pm

1 stop22h 31m

$180

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Thu 10/2

7:41 pm-10:40 am

1 stop14h 59m

Islip Long Island

Sat 10/4

5:05 pm-11:22 am

2 stops18h 17m

$204

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Fri 11/28

3:40 pm-11:50 pm

1 stop8h 10m

Islip Long Island

Mon 12/1

5:50 pm-12:05 am

1 stop6h 15m

$258

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Thu 10/23

8:19 pm-9:04 am

2 stops12h 45m

Islip Long Island

Sun 10/26

9:47 pm-11:19 am

2 stops13h 32m

$285

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Fri 10/3

5:45 pm-11:45 pm

1 stop6h 00m

Islip Long Island

Mon 10/6

5:35 pm-11:50 pm

1 stop6h 15m

$301

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Thu 10/2

5:45 am-11:50 am

1 stop6h 05m

Islip Long Island

Sun 10/5

12:55 pm-11:10 pm

1 stop10h 15m

$314

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Fri 10/3

5:45 pm-11:45 pm

1 stop6h 00m

Islip Long Island

Sun 10/5

12:55 pm-11:10 pm

1 stop10h 15m

$314

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Thu 10/23

8:19 pm-1:45 pm

1 stop17h 26m

Islip Long Island

Sun 10/26

9:47 pm-11:19 am

2 stops13h 32m

$348

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Wed 11/26

2:45 pm-11:55 pm

1 stop9h 10m

$144

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 12 results
1
2

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?

Currently, January is the cheapest month in which you can book a flight from Buffalo to Islip (average of $108). Flying from Buffalo to Islip in November is currently the most expensive (average of $213). 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 September 17, 2025.

One of the essential ways to save on airfare from Buffalo to Islip is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at noon could potentially save you up to 21% 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 September 17, 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
8.0
Very good
4,242 reviews

Overall

8.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Food

7.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Overall

8.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Food

7.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

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?

    There are many flights that can get you from Buffalo to Islip in 4h 55m. Fly via Southwest or Frontier to get the fastest option. Airlines will cover a distance of 325 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Our cheapest airline available from Buffalo to Islip is Southwest. Our recent data shows that you can find tickets from as low as $199 on this airline. Southwest is currently priced 40% below the average price you’ll pay for this route.

  • 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?

    Currently, January is the cheapest month in which you can book a flight from Buffalo to Islip (average of $108). Flying from Buffalo to Islip in November is currently the most expensive (average of $213). 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
Southampton

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Alternative routes for Buffalo to Islip

See prices for flight routes from nearby airports that may be better suited for you.
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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 September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$199Average$376FlexibilityNo cancel feeOn-time63%

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