HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Islip

$161+ 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 4/16. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — ISP
Dec 18 — Dec 251
Thu 12/18
Thu 12/25
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Buffalo to Islip with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 November 18, 2025.

This Southwest deal was found by Cheapflights users on 11/18. 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 12/119:30 amBUF - ISP
1 stop5h 50mSouthwest
Sat 12/136:00 amISP - BUF
1 stop5h 50mSouthwest
Deal found 11/18$226
This Kiwi.com deal was found by Cheapflights users on 11/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/182:07 pmBUF - ISP
1 stop29h 33mFrontier
Mon 12/228:35 pmISP - BUF
1 stop16h 17mFrontier
Deal found 11/16$315
This Southwest deal was found by Cheapflights users on 11/17. 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 12/185:45 pmBUF - ISP
1 stop6h 05mSouthwest
Mon 12/222:45 pmISP - BUF
2 stops8h 50mSouthwest
Deal found 11/17$392
This Southwest deal was found by Cheapflights users on 11/18. 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 12/18:50 amBUF - ISP
1 stop3h 05mSouthwest
Wed 12/33:55 pmISP - BUF
1 stop6h 05mSouthwest
Deal found 11/18$405
This Kiwi.com deal was found by Cheapflights users on 11/17. 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.
Wed 11/263:28 pmBUF - ISP
2 stops17h 39mFrontier
Sun 11/308:25 pmISP - BUF
1 stop19h 55mFrontier
Deal found 11/17$412

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 November 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$252
(Trip.com)

One-way from

$161
(Southwest)

Popular in

August

Cheapest in

January

Average price

$196
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. 3% potential increase in price ($7 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($2 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
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 November 18, 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 12/11

9:30 am-3:20 pm

1 stop5h 50m

Islip Long Island

Sat 12/13

6:00 am-11:50 am

1 stop5h 50m

$226

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Thu 12/18

2:07 pm-7:40 pm

1 stop29h 33m

Islip Long Island

Mon 12/22

8:35 pm-12:52 pm

1 stop16h 17m

$315

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Thu 12/18

5:45 pm-11:50 pm

1 stop6h 05m

Islip Long Island

Mon 12/22

2:45 pm-11:35 pm

2 stops8h 50m

$392

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Mon 12/1

8:50 am-11:55 am

1 stop3h 05m

Islip Long Island

Wed 12/3

3:55 pm-10:00 pm

1 stop6h 05m

$405

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Mon 12/1

12:25 pm-11:10 pm

2 stops10h 45m

Islip Long Island

Tue 12/2

5:40 am-3:50 pm

2 stops10h 10m

$463

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Thu 4/16

12:40 pm-4:30 pm

1 stop3h 50m

$161

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Sun 12/21

11:15 am-5:15 pm

1 stop6h 00m

$209

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Fri 11/28

3:28 pm-8:02 am

2 stops16h 34m

$238

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Fri 11/28

10:24 am-11:53 pm

3 stops37h 29m

$419

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Mon 1/19

10:11 am-7:50 pm

1 stop9h 39m

$566

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/17

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 November.
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 May 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 November 18, 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 November 18, 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
4,248 reviews

Crew

8.6

Boarding

8.1

Food

7.0

Comfort

8.0

Entertainment

7.5

Overall

8.0

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
4,248 reviews
Southwest
8.0
Very good
4,248 reviews

Crew

8.6

Boarding

8.1

Food

7.0

Comfort

8.0

Entertainment

7.5

Overall

8.0

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, New York?

    A quick flight from Buffalo to Islip, New York can take about 7h 05m. Frontier provides one of the quickest options available for as low as $283. 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 May 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
Southampton

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Buffalo to Islip

See prices for flight routes from nearby airports that may be better suited for you.
LaGuardia to Buffalo flights
John F Kennedy Intl to Buffalo flights
Newark to Buffalo flights
Buffalo to John F Kennedy Intl flights
Buffalo to LaGuardia flights
Rochester to John F Kennedy Intl flights
Buffalo to Newark flights
Rochester to LaGuardia flights
Rochester to Newark flights
LaGuardia to Rochester flights
Newark to Rochester flights
John F Kennedy Intl to Rochester flights
Syracuse to John F Kennedy Intl flights
Syracuse to Newark flights
Syracuse to LaGuardia flights
LaGuardia to Syracuse flights
Newark to Syracuse flights
John F Kennedy Intl to Syracuse flights
Stewart to Rochester flights
John F Kennedy Intl to Albany flights
White Plains to Buffalo flights
Albany to John F Kennedy Intl flights
Newark to Albany flights
LaGuardia to Albany flights
Albany to Buffalo flights
John F Kennedy Intl to Ithaca flights
Newark to Ithaca flights
LaGuardia to Ithaca flights
Albany to LaGuardia flights
Albany to Newark flights
Ithaca to John F Kennedy Intl flights
Islip to Rochester flights
Buffalo to White Plains flights
Rochester to Islip flights
Islip to Albany flights
White Plains to Syracuse flights
White Plains to Rochester flights
Ithaca to LaGuardia flights
Rochester to Stewart flights
White Plains to LaGuardia flights
John F Kennedy Intl to Islip flights
Newark to Islip flights
Stewart to Syracuse flights
Buffalo to Albany flights
Ithaca to Newark flights
LaGuardia to Islip flights
Islip to Buffalo flights
John F Kennedy Intl to Saranac Lake flights

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 November 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$199Average$376FlexibilityNo cancel feeOn-time63%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.