HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Buffalo

$178+ Cheap flights from Islip, NY to Buffalo (ISP - BUF)

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 11/16. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — BUF
Nov 27 — Dec 41
Thu 11/27
Thu 12/4
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Islip to Buffalo 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 Islip to Buffalo

Cheapest flights from Islip to Buffalo
Explore the most affordable flight options available from Islip to Buffalo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 28, 2025.

This Mytrip deal was found by Cheapflights users on 10/26. 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.
Sun 11/169:27 pmISP - BUF
1 stop14h 17mFrontier
Mon 11/179:53 pmBUF - ISP
1 stop19h 49mFrontier
Deal found 10/26$178
This Booking.com deal was found by Cheapflights users on 10/26. 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 11/149:39 amISP - BUF
1 stop24h 29mFrontier
Mon 11/179:53 pmBUF - ISP
1 stop19h 49mFrontier
Deal found 10/26$181
This Mytrip deal was found by Cheapflights users on 10/27. 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.
Fri 11/74:58 pmISP - BUF
1 stop25h 19mFrontier
Sun 11/98:54 pmBUF - ISP
1 stop12h 15mFrontier
Deal found 10/27$185
This Booking.com deal was found by Cheapflights users on 10/27. 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.
Sat 11/84:58 pmISP - BUF
1 stop25h 06mFrontier
Sun 11/98:54 pmBUF - ISP
1 stop12h 15mFrontier
Deal found 10/27$188
This Booking.com deal was found by Cheapflights users on 10/27. 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.
Sat 11/84:58 pmISP - BUF
1 stop25h 06mFrontier
Mon 11/109:53 pmBUF - ISP
1 stop19h 49mFrontier
Deal found 10/27$214
This Booking.com deal was found by Cheapflights users on 10/26. 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 10/306:37 pmISP - BUF
1 stop17h 07mFrontier
Sat 11/110:53 amBUF - ISP
1 stop22h 09mFrontier
Deal found 10/26$240
This Southwest deal was found by Cheapflights users on 10/25. 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.
Sat 11/86:00 amISP - BUF
1 stop5h 50mSouthwest
Sun 11/97:55 amBUF - ISP
1 stop4h 55mSouthwest
Deal found 10/25$301
This Booking.com deal was found by Cheapflights users on 10/26. 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.
Sat 11/14:58 pmISP - BUF
1 stop26h 06mFrontier
Mon 11/39:53 pmBUF - ISP
1 stop19h 49mFrontier
Deal found 10/26$302
This Trip.com deal was found by Cheapflights users on 10/26. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/109:54 amISP - BUF
2 stops11h 14mFrontier
Fri 11/142:42 pmBUF - ISP
2 stops20h 13mFrontier
Deal found 10/26$335

Cheap flight deals from Islip to Buffalo

Discover tips and strategies to find the most affordable flight options for your journey from Islip (ISP) to Buffalo (BUF). 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 October 28, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$178
(Mytrip)

Popular in

October

Cheapest in

January

Average price

$571
Provider with most accurate pricing for Islip Long Island-Buffalo flight deals.
Search Deals
Provider most trusted by Cheapflights users for Islip Long Island-Buffalo flights.
Search Deals
From Islip Long Island to Buffalo
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($73 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Islip to Buffalo 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 October 28, 2025.
Use the filters below to find and compare flights from Islip to Buffalo that are best for you.

Fly from

Islip

Fly to

Buffalo

Route

Depart

Return

Price

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Sun 11/16

9:27 pm-11:44 am

1 stop14h 17m

Buffalo

Mon 11/17

9:53 pm-5:42 pm

1 stop19h 49m

$178

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Fri 11/14

9:39 am-10:08 am

1 stop24h 29m

Buffalo

Mon 11/17

9:53 pm-5:42 pm

1 stop19h 49m

$181

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Sat 11/8

4:58 pm-6:04 pm

1 stop25h 06m

Buffalo

Sun 11/9

8:54 pm-9:09 am

1 stop12h 15m

$188

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Sat 11/8

4:58 pm-6:04 pm

1 stop25h 06m

Buffalo

Mon 11/10

9:53 pm-5:42 pm

1 stop19h 49m

$214

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Sat 11/8

6:00 am-11:50 am

1 stop5h 50m

Buffalo

Sun 11/9

7:55 am-12:50 pm

1 stop4h 55m

$301

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Mon 11/10

9:54 am-9:08 pm

2 stops11h 14m

Buffalo

Fri 11/14

2:42 pm-10:55 am

2 stops20h 13m

$335

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Fri 11/7

4:58 pm-6:17 pm

1 stop25h 19m

Buffalo

Sun 11/9

2:42 pm-7:06 pm

2 stops28h 24m

$367

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Fri 11/21

11:32 am-5:29 pm

1 stop29h 57m

Buffalo

Fri 11/28

11:52 am-8:02 am

1 stop20h 10m

$380

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Fri 11/7

4:58 pm-6:17 pm

1 stop25h 19m

Buffalo

Mon 11/10

9:53 pm-5:42 pm

1 stop19h 49m

$388

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Fri 11/7

11:05 am-10:00 pm

2 stops10h 55m

Buffalo

Mon 11/10

5:45 am-12:50 pm

1 stop7h 05m

$414

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/27

Showing 1-10 of 12 results
1
2

Compare providers for flights from Islip to Buffalo

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 Islip to Buffalo in October.
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 Islip, New York-Buffalo flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Islip, New York-Buffalo flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Islip, New York-Buffalo flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Islip, New York-Buffalo 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 Islip, New York-Buffalo 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 Islip to Buffalo

Have a flexible travel schedule? Discover the best time to fly to Buffalo from Islip 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 Islip to Buffalo

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

Currently, February is the cheapest month in which you can book a flight from Islip, New York to Buffalo (average of $64). Flying from Islip, New York to Buffalo in June is currently the most expensive (average of $117). 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 ISP to BUF?

Find hourly flight availability from Islip to Buffalo. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 28, 2025.

It’s typically best to fly out from Islip, New York to Buffalo at noon. Doing so could potentially save you 65% on the flight price compared to flying in the evening, which is usually more expensive.

Reviews of airlines servicing Buffalo

Get insights into the airlines that provide service to Buffalo. 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 Buffalo. Reviews last updated October 28, 2025.
Read through reviews of airlines operating flights from Islip to Buffalo, such as Southwest. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,240 reviews

Overall

8.0

Comfort

8.0

Food

7.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

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
4,240 reviews
Southwest
8.0
Very good
4,240 reviews

Overall

8.0

Comfort

8.0

Food

7.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

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 Islip to Buffalo. 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 Islip, New York to Buffalo?

    Airlines like Frontier and Southwest fly from Islip, New York to Buffalo in about 5h 50m. The time it takes to get you to your destination can typically vary by up to 8h 27m. There are 325 mi between Islip, New York and Buffalo. This flight may include one or multiple stops.

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

    Cheapflights users have booked flights from Islip, New York to Buffalo round-trip from $213. This flight start at 46% lower than the current average price 3 months from now.

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

    Yes. In addition to deals on Islip to Buffalo flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Islip to Buffalo?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Islip to Buffalo.

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

    Yes. Cheapflights offers flight deals from Islip to Buffalo 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 Islip, New York to Buffalo?

    Currently, February is the cheapest month in which you can book a flight from Islip, New York to Buffalo (average of $64). Flying from Islip, New York to Buffalo in June is currently the most expensive (average of $117). 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 Buffalo?

Book flights to Buffalo if you plan to visit one of these locations
Lockport
Cheektowaga
Orchard Park
Batavia
Williamsville
Eden
Amherst
West Seneca

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 Islip to Buffalo

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

Top airline flying from Islip to Buffalo

Discover the top airline that operate flights from Islip to Buffalo. 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 October 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$213Average$426FlexibilityNo 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.