How long is the flight from Buffalo to Islip, New York?

A quick flight from Buffalo to Islip, New York can take about 12h 49m. Frontier provides one of the quickest options available for as low as $208. 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..

In terms of precipitation, rainfall in Islip, New York ranges from 3.3 - 4.4 inches per month. March is typically the wettest month, when rainfall can reach 4.4 in. February is typically the driest time to visit Islip, New York when rainfall is around 3.3 in.

If weather is an important factor for your trip to Islip, New York, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

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

When flying from Buffalo to Islip, New York, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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.

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.

$208+ Flights from Buffalo to Islip, NY

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

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.

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 28, 2025.

Tue 12/306:55 amBUF - ISP

1 stop7h 05mSouthwest

Thu 1/13:55 pmISP - BUF

1 stop6h 05mSouthwest

Deal found 12/26

$643

Sat 12/275:35 amBUF - ISP

1 stop6h 10mSouthwest

Sat 1/311:00 amISP - BUF

1 stop6h 55mSouthwest

Deal found 12/26

$884

Best flights from Buffalo to Islip
Discover carefully curated flight deals from Buffalo to Islip that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 28, 2025.

Sat 1/178:06 pmBUF - ISP

1 stop12h 49mFrontier

Sun 1/181:42 pmISP - BUF

1 stop19h 39mFrontier

Deal found 12/27

$208

Thu 1/1510:11 amBUF - ISP

1 stop9h 39mMultiple Airlines

Sun 1/1811:55 amISP - BUF

2 stops21h 26mMultiple Airlines

Deal found 12/27

$249

Wed 5/69:45 amBUF - ISP

1 stop4h 05mSouthwest

Wed 5/136:55 amISP - BUF

2 stops8h 25mSouthwest

Deal found 12/26

$296

Thu 1/158:58 pmBUF - ISP

1 stop23h 11mFrontier

Sun 1/188:45 pmISP - BUF

1 stop12h 36mFrontier

Deal found 12/27

$213

Sat 1/178:06 pmBUF - ISP

1 stop12h 49mFrontier

Thu 1/227:43 pmISP - BUF

1 stop22h 53mFrontier

Deal found 12/27

$230

Sat 1/178:06 pmBUF - ISP

1 stop12h 49mMultiple Airlines

Wed 1/2111:50 amISP - BUF

2 stops31h 14mMultiple Airlines

Deal found 12/27

$257

Thu 1/158:58 pmBUF - ISP

1 stop23h 11mFrontier

Thu 1/227:43 pmISP - BUF

1 stop22h 53mFrontier

Deal found 12/27

$236

Fri 1/168:58 pmBUF - ISP

1 stop25h 48mMultiple Airlines

Wed 1/2111:50 amISP - BUF

2 stops31h 14mMultiple Airlines

Deal found 12/27

$302

Thu 1/1510:11 amBUF - ISP

1 stop9h 39mFrontier

Sat 1/176:47 pmISP - BUF

1 stop14h 34mFrontier

Deal found 12/27

$268

Fri 1/168:58 pmBUF - ISP

1 stop25h 48mFrontier

Thu 1/227:43 pmISP - BUF

1 stop22h 53mFrontier

Deal found 12/27

$275

Sun 1/1810:11 amBUF - ISP

1 stop9h 39mFrontier

Thu 1/227:43 pmISP - BUF

1 stop22h 53mFrontier

Deal found 12/27

$293

Mon 1/1910:11 amBUF - ISP

1 stop9h 39mFrontier

Thu 1/227:43 pmISP - BUF

1 stop22h 53mFrontier

Deal found 12/27

$293

Last-minute flights from Buffalo to Islip
Discover last-minute flight deals from Buffalo to Islip. Data last updated December 28, 2025 and is based on user searches.

Thu 1/158:58 pmBUF - ISP

1 stop23h 11mFrontier

Sun 1/188:45 pmISP - BUF

1 stop12h 36mFrontier

Deal found 12/27

$213

Thu 1/158:58 pmBUF - ISP

1 stop23h 11mFrontier

Thu 1/227:43 pmISP - BUF

1 stop22h 53mFrontier

Deal found 12/27

$236

Thu 1/1510:11 amBUF - ISP

1 stop9h 39mMultiple Airlines

Sun 1/1811:55 amISP - BUF

2 stops21h 26mMultiple Airlines

Deal found 12/27

$249

Thu 1/158:58 pmBUF - ISP

1 stop23h 11mMultiple Airlines

Wed 1/2111:50 amISP - BUF

2 stops31h 14mMultiple Airlines

Deal found 12/27

$263

Thu 1/1510:11 amBUF - ISP

1 stop9h 39mFrontier

Sat 1/176:47 pmISP - BUF

1 stop14h 34mFrontier

Deal found 12/27

$268

Thu 1/158:58 pmBUF - ISP

2 stops16h 23mMultiple Airlines

Thu 1/227:43 pmISP - BUF

1 stop22h 53mMultiple Airlines

Deal found 12/27

$290

Fri 1/168:58 pmBUF - ISP

1 stop25h 48mFrontier

Thu 1/227:43 pmISP - BUF

1 stop22h 53mFrontier

Deal found 12/27

$275

Fri 1/168:58 pmBUF - ISP

1 stop25h 48mMultiple Airlines

Wed 1/2111:50 amISP - BUF

2 stops31h 14mMultiple Airlines

Deal found 12/27

$302

Sat 1/178:06 pmBUF - ISP

1 stop12h 49mFrontier

Sun 1/181:42 pmISP - BUF

1 stop19h 39mFrontier

Deal found 12/27

$208

Sat 1/178:06 pmBUF - ISP

1 stop12h 49mFrontier

Thu 1/227:43 pmISP - BUF

1 stop22h 53mFrontier

Deal found 12/27

$230

Sat 1/178:06 pmBUF - ISP

1 stop12h 49mMultiple Airlines

Wed 1/2111:50 amISP - BUF

2 stops31h 14mMultiple Airlines

Deal found 12/27

$257

Sun 1/1810:11 amBUF - ISP

1 stop9h 39mFrontier

Thu 1/227:43 pmISP - BUF

1 stop22h 53mFrontier

Deal found 12/27

$293

One-way flights from Buffalo to Islip
Search for one-way flight options from Buffalo to Islip. Find affordable one-way fares based on user searches. Data last updated December 28, 2025.

Mon 1/510:43 amBUF - ISP

2 stops48h 27mMultiple Airlines

Deal found 12/27

$243

Mon 1/510:43 amBUF - ISP

1 stop8h 56mFrontier

Deal found 12/27

$253

Sun 1/41:37 pmBUF - ISP

1 stop23h 32mFrontier

Deal found 12/27

$312

Sun 1/41:37 pmBUF - ISP

2 stops24h 08mMultiple Airlines

Deal found 12/27

$315

Find flight deals from Buffalo to Islip

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$208 (Kiwi.com)
Popular in	December
Cheapest in	January
Average price	$204

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

High demand for flights, 0% potential price rise

Search Deals

Cheapest flight prices on average. 1% potential price decrease ($3 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Sat 1/17

8:06 pm-8:55 am

1 stop12h 49m

Islip Long Island

Sun 1/18

1:42 pm-9:21 am

1 stop19h 39m

$208

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Thu 1/15

8:58 pm-8:09 pm

1 stop23h 11m

Islip Long Island

Sun 1/18

8:45 pm-9:21 am

1 stop12h 36m

$213

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Sat 1/17

8:06 pm-8:55 am

1 stop12h 49m

Islip Long Island

Thu 1/22

7:43 pm-6:36 pm

1 stop22h 53m

$230

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Thu 1/15

8:58 pm-8:09 pm

1 stop23h 11m

Islip Long Island

Thu 1/22

7:43 pm-6:36 pm

1 stop22h 53m

$236

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Thu 1/15

10:11 am-7:50 pm

1 stop9h 39m

Islip Long Island

Sun 1/18

11:55 am-9:21 am

2 stops21h 26m

$249

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Sat 1/17

8:06 pm-8:55 am

1 stop12h 49m

Islip Long Island

Wed 1/21

11:50 am-7:04 pm

2 stops31h 14m

$257

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Thu 1/15

10:11 am-7:50 pm

1 stop9h 39m

Islip Long Island

Sat 1/17

6:47 pm-9:21 am

1 stop14h 34m

$268

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Fri 1/16

8:58 pm-10:46 pm

1 stop25h 48m

Islip Long Island

Thu 1/22

7:43 pm-6:36 pm

1 stop22h 53m

$275

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Sun 1/18

10:11 am-7:50 pm

1 stop9h 39m

Islip Long Island

Thu 1/22

7:43 pm-6:36 pm

1 stop22h 53m

$293

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Mon 1/19

10:11 am-7:50 pm

1 stop9h 39m

Islip Long Island

Thu 1/22

7:43 pm-6:36 pm

1 stop22h 53m

$293

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/27

Showing 1-10 of 16 results

Compare providers for flights from Buffalo to Islip

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.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust 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.

Reviews of airlines servicing Islip

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

4,256 reviews

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

4,256 reviews

Southwest

8.0

Very good

4,256 reviews

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

How long is the flight from Buffalo to Islip, New York?
A quick flight from Buffalo to Islip, New York can take about 12h 49m. Frontier provides one of the quickest options available for as low as $208. 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, 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

Riverhead

Browse thousands of different options on Cheapflights for your next trip

Top airline flying from Buffalo to Islip

Airline	Cheapest	Average	Flexibility	On-time
Southwest	Cheapest$199	Average$335	FlexibilityNo cancel fee	On-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.

$208+ Cheap flights from Buffalo to Islip, NY (BUF - ISP)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/17. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Buffalo to Islip with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Buffalo to Islip

Cheapest flights from Buffalo to IslipExplore 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 28, 2025.

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 28, 2025.

Find flight deals from Buffalo to Islip

Most accurate provider

Most trusted provider

Round-trip from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

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

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.

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.

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?

Reviews of airlines servicing Islip

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.

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?

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

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

How can I find direct flights from Buffalo to Islip?

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

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

Traveling to a place near Islip?

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.

Top airline flying from Buffalo to Islip

100% Free

Book with Flexibility

Travel Smart

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 28, 2025.