What is the cheapest airline that flies from Islip Long Island to Buffalo?

Southwest, Frontier, and JetBlue are the most popular carriers operating from Islip Long Island to Buffalo

What airlines fly to Buffalo?

JetBlue, Delta and United Airlines are the top three most popular airlines that fly to Buffalo from Islip, New York according to our data. JetBlue is the first choice among our users, with 34% of people opting to fly with this airline when traveling to Buffalo. Keep in mind that there are 6 different airlines that fly to Buffalo on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Islip Long Island Airport to Buffalo Airport?

Prices for flights from Islip Long Island Airport to Buffalo Airport are updated daily.

How many operators does momondo search for flights from Islip Long Island Airport to Buffalo Airport?

There is 1 operator available for flights from Islip Long Island Airport to Buffalo Airport as of December 2025.

How old do you have to be to fly from Islip Long Island Airport to Buffalo Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Islip Long Island Airport to Buffalo Airport.

What documentation or ID do you need to fly to Buffalo Airport?

The travel and health documents required for your trip to Buffalo Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Buffalo Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$87 Cheap Flights from Islip to Buffalo in 2025/26

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Find the cheapest flights from Islip, New York to Buffalo

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:00 am - 12:30 pm

ISP

BUF

6h 30m1 stop

12:35 pm - 4:35 pm

BUF

ISP

4h 00m1 stop

$329Southwest

Fri, Jan 23 - Sun, Jan 25

6:00 am - 12:30 pm

ISP

BUF

6h 30m1 stop

5:50 am - 4:35 pm

BUF

ISP

10h 45m2 stops

$334Southwest

Fri, Jan 23 - Sun, Jan 25

6:00 am - 3:10 pm

ISP

BUF

9h 10m2 stops

5:50 am - 4:35 pm

BUF

ISP

10h 45m2 stops

$339Southwest

Fri, Jan 23 - Sun, Jan 25

6:00 am - 12:30 pm

ISP

BUF

6h 30m1 stop

7:05 am - 1:30 pm

BUF

ISP

6h 25m1 stop

$357Southwest

Fri, Jan 9 - Sun, Jan 11

6:00 am - 3:10 pm

ISP

BUF

9h 10m2 stops

12:35 pm - 4:35 pm

BUF

ISP

4h 00m1 stop

$362Southwest

Fri, Jan 9 - Sun, Jan 11

6:00 am - 3:10 pm

ISP

BUF

9h 10m2 stops

1:05 pm - 10:20 pm

BUF

ISP

9h 15m2 stops

$367Southwest

Fri, Jan 9 - Sun, Jan 11

5:27 pm - 1:12 pm

ISP

BUF

19h 45m1 stop

6:32 pm - 1:45 pm

BUF

ISP

19h 13m1 stop

$435Multiple Airlines

Wed, Dec 31 - Sun, Jan 4

5:27 pm - 1:12 pm

ISP

BUF

19h 45m1 stop

1:37 pm - 8:07 pm

BUF

ISP

30h 30m2 stops

$481Multiple Airlines

Wed, Dec 31 - Sun, Jan 4

5:40 am - 11:50 am

ISP

BUF

6h 10m1 stop

5:00 am - 5:05 pm

BUF

ISP

12h 05m1 stop

$601Southwest

Tue, Dec 23 - Sun, Dec 28

5:40 am - 2:45 pm

ISP

BUF

9h 05m2 stops

5:00 am - 5:05 pm

BUF

ISP

12h 05m1 stop

$607Southwest

Tue, Dec 23 - Sun, Dec 28

Southwest flights from Islip, New York to Buffalo

Our best Southwest deals on Islip, New York to Buffalo flight tickets

Southwest

Jan 23

ISP6:00 amIslip Long Island

6h 30m

1 stop

BUF12:30 pmBuffalo

Jan 25

BUF12:35 pmBuffalo

4h 00m

1 stop

ISP4:35 pmIslip Long Island

$329

Find similar

Southwest

Jan 23

ISP6:00 amIslip Long Island

6h 30m

1 stop

BUF12:30 pmBuffalo

Jan 25

BUF5:50 amBuffalo

10h 45m

2 stops

ISP4:35 pmIslip Long Island

$334

Find similar

Southwest

Jan 23

ISP6:00 amIslip Long Island

9h 10m

2 stops

BUF3:10 pmBuffalo

Jan 25

BUF5:50 amBuffalo

10h 45m

2 stops

ISP4:35 pmIslip Long Island

$339

Find similar

Frontier flights from Islip, New York to Buffalo

Our best Frontier deals on Islip, New York to Buffalo flight tickets

Frontier

Jan 15

ISP7:58 pmIslip Long Island

24h 05m

1 stop

BUF8:03 pmBuffalo

Jan 22

BUF7:59 pmBuffalo

24h 48m

1 stop

ISP8:47 pmIslip Long Island

$261

Find similar

Frontier

Dec 29

ISP2:04 pmIslip Long Island

7h 04m

1 stop

BUF9:08 pmBuffalo

Jan 2

BUF9:57 amBuffalo

9h 43m

1 stop

ISP7:40 pmIslip Long Island

$696

Find similar

Frontier

Dec 23

ISP6:25 amIslip Long Island

11h 12m

1 stop

BUF5:37 pmBuffalo

Dec 27

BUF9:28 amBuffalo

8h 27m

1 stop

ISP5:55 pmIslip Long Island

$702

Find similar

Fly from

Fly to

Route

Depart

Return

Price

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Fri 1/23

6:00 am-12:30 pm

1 stop6h 30m

Buffalo

Sun 1/25

12:35 pm-4:35 pm

1 stop4h 00m

$329

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Fri 1/23

6:00 am-12:30 pm

1 stop6h 30m

Buffalo

Sun 1/25

5:50 am-4:35 pm

2 stops10h 45m

$334

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Fri 1/23

6:00 am-3:10 pm

2 stops9h 10m

Buffalo

Sun 1/25

5:50 am-4:35 pm

2 stops10h 45m

$339

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Fri 1/9

6:00 am-12:30 pm

1 stop6h 30m

Buffalo

Sun 1/11

7:05 am-1:30 pm

1 stop6h 25m

$357

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Fri 1/9

6:00 am-3:10 pm

2 stops9h 10m

Buffalo

Sun 1/11

12:35 pm-4:35 pm

1 stop4h 00m

$362

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Fri 1/9

6:00 am-3:10 pm

2 stops9h 10m

Buffalo

Sun 1/11

1:05 pm-10:20 pm

2 stops9h 15m

$367

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Wed 12/31

5:27 pm-1:12 pm

1 stop19h 45m

Buffalo

Sun 1/4

6:32 pm-1:45 pm

1 stop19h 13m

$435

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Wed 12/31

5:27 pm-1:12 pm

1 stop19h 45m

Buffalo

Sun 1/4

1:37 pm-8:07 pm

2 stops30h 30m

$481

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Tue 12/23

5:40 am-11:50 am

1 stop6h 10m

Buffalo

Sun 12/28

5:00 am-5:05 pm

1 stop12h 05m

$601

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Tue 12/23

5:40 am-2:45 pm

2 stops9h 05m

Buffalo

Sun 12/28

5:00 am-5:05 pm

1 stop12h 05m

$607

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Islip, New York to Buffalo

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest day to depart on your flight to Buffalo?

Our data shows that Tuesday is the least expensive day to fly to Buffalo. Tickets to fly out on this day can be as low as $197. Flights from Islip, New York to Buffalo on a Sunday will generally be more expensive and average around $228. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Buffalo?

In the morning is the cheapest time of day to fly from Islip, New York to Buffalo when you can find flight prices for as low as $213. Flying to Buffalo in the morning is an ideal time because this is during off-peak travel hours. At noon is when there is more demand to fly to Buffalo, so prices are often more expensive at around $233 per ticket.

When to book flights from Islip, New York to Buffalo

Are you open to changing your travel dates? Check out the ideal times to fly from Islip, New York to Buffalo according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Islip, New York to Buffalo (ISP to BUF) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Islip, New York to Buffalo

Fastest flight time	4h 10m
Direct flights	None

The fastest flight from Islip, New York to Buffalo takes 4h 10m

There are no direct flights from Islip, New York to Buffalo. There are no popular flight routes from Islip, New York to Buffalo.

Search flight deals

How far is Islip Long Island to Buffalo by plane?
Islip Long Island and Buffalo are 327.4 mi apart from one another. In terms of flight time, this usually takes a little over 4h 10m.
When did momondo last update prices for flights from Islip Long Island Airport to Buffalo Airport?
Prices for flights from Islip Long Island Airport to Buffalo Airport are updated daily.
How many operators does momondo search for flights from Islip Long Island Airport to Buffalo Airport?
There is 1 operator available for flights from Islip Long Island Airport to Buffalo Airport as of December 2025.
How old do you have to be to fly from Islip Long Island Airport to Buffalo Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Islip Long Island Airport to Buffalo Airport.
What documentation or ID do you need to fly to Buffalo Airport?
The travel and health documents required for your trip to Buffalo Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Buffalo Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular airline from Islip, New York to Buffalo?
Based on momondo bookings for flights between Islip, New York and Buffalo, the leading airline is Southwest, making up 100% of the total bookings.

Best airlines flying from Islip, New York to Buffalo

Compare and see reviews for airlines that fly from Islip, New York to Buffalo with momondo

Airline	Rating	Free Cancellation	Price
Southwest	PriceFrom $183	Free Cancellation	Rating 7.9 4,250 reviews		Search Southwest flights

Batavia

Cheektowaga

Amherst

Tonawanda

Grand Island

Williamsville

Orchard Park

Lockport

West Seneca

Bowmansville

East Aurora

Eden

Angola

Why use momondo?

Why should I use momondo to find a flight deal from Islip to Buffalo?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Buffalo from Islip.

Can I find flights from Islip to Buffalo with flexible booking policies on momondo?

All flight searches from Islip to Buffalo on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Islip to Buffalo?

momondo provides multiple filters to help you find the best flight to Buffalo from Islip. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Islip to Buffalo right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Buffalo from Islip. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.