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

Frontier is the most popular carrier operating from Buffalo to Islip Long Island

What airlines fly to Islip, New York?

Delta, JetBlue and United Airlines are the top three most popular airlines that fly to Islip, New York from Buffalo according to our data. Delta is the first choice among our users, with 35% of people opting to fly with this airline when traveling to Islip, New York. Keep in mind that there are 5 different airlines that fly to Islip, New York on a routine basis, so you have a few additional options to choose from.

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

Prices for flights from Buffalo Airport to Islip Long Island Airport were last updated today.

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

As of December 2025, there is 1 operator available to choose from for flights from Buffalo Airport to Islip Long Island Airport.

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

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Buffalo Airport to Islip Long Island Airport.

What documentation or ID do you need to fly to Islip Long Island Airport?

The travel and health documents you'll need for your trip to Islip Long Island Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Islip Long Island Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$160 Cheap Flights from Buffalo to Islip in 2025/26

1 adult

0 bags

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Find the cheapest flights from Buffalo to New York

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

9:08 am - 7:51 pm

BUF

ISP

10h 43m1 stop

8:54 pm - 7:11 pm

ISP

BUF

22h 17m1 stop

$289Frontier

Mon, Jan 12 - Fri, Jan 16

3:45 pm - 9:55 pm

BUF

ISP

6h 10m1 stop

5:55 am - 2:05 pm

ISP

BUF

8h 10m2 stops

$322Southwest

Mon, Jan 12 - Fri, Jan 16

5:35 am - 1:10 pm

BUF

ISP

7h 35m1 stop

12:30 pm - 7:45 pm

ISP

BUF

7h 15m1 stop

$346Southwest

Sat, May 23 - Mon, May 25

10:15 am - 11:20 pm

BUF

ISP

13h 05m2 stops

12:30 pm - 7:45 pm

ISP

BUF

7h 15m1 stop

$357Southwest

Sat, May 23 - Mon, May 25

7:30 am - 9:55 pm

BUF

ISP

14h 25m2 stops

12:35 pm - 10:30 pm

ISP

BUF

9h 55m2 stops

$363Southwest

Mon, Jan 12 - Fri, Jan 16

10:15 am - 11:20 pm

BUF

ISP

13h 05m2 stops

12:30 pm - 10:45 pm

ISP

BUF

10h 15m2 stops

$375Southwest

Sat, May 23 - Mon, May 25

10:11 am - 7:50 pm

BUF

ISP

9h 39m1 stop

12:25 pm - 8:18 pm

ISP

BUF

7h 53m1 stop

$382Multiple Airlines

Mon, Jan 19 - Mon, Jan 26

10:11 am - 7:50 pm

BUF

ISP

9h 39m1 stop

11:05 am - 11:47 pm

ISP

BUF

12h 42m2 stops

$427Multiple Airlines

Mon, Jan 19 - Mon, Jan 26

7:00 am - 4:10 pm

BUF

ISP

9h 10m2 stops

11:05 am - 11:47 pm

ISP

BUF

12h 42m2 stops

$686Multiple Airlines

Mon, Jan 19 - Mon, Jan 26

11:42 am - 7:11 pm

BUF

ISP

7h 29m1 stop

9:41 am - 8:33 pm

ISP

BUF

10h 52m1 stop

$1,130Frontier

Thu, Apr 2 - Sun, Apr 5

Southwest flights from Buffalo to Islip, New York

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

Southwest

Jan 12

BUF3:45 pmBuffalo

6h 10m

1 stop

ISP9:55 pmIslip Long Island

Jan 16

ISP5:55 amIslip Long Island

8h 10m

2 stops

BUF2:05 pmBuffalo

$322

Find similar

Southwest

May 23

BUF5:35 amBuffalo

7h 35m

1 stop

ISP1:10 pmIslip Long Island

May 25

ISP12:30 pmIslip Long Island

7h 15m

1 stop

BUF7:45 pmBuffalo

$346

Find similar

Southwest

May 23

BUF10:15 amBuffalo

13h 05m

2 stops

ISP11:20 pmIslip Long Island

May 25

ISP12:30 pmIslip Long Island

7h 15m

1 stop

BUF7:45 pmBuffalo

$357

Find similar

Frontier flights from Buffalo to Islip, New York

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

Frontier

Jan 12

BUF9:08 amBuffalo

10h 43m

1 stop

ISP7:51 pmIslip Long Island

Jan 16

ISP8:54 pmIslip Long Island

22h 17m

1 stop

BUF7:11 pmBuffalo

$289

Find similar

Frontier

Apr 2

BUF11:42 amBuffalo

7h 29m

1 stop

ISP7:11 pmIslip Long Island

Apr 5

ISP9:41 amIslip Long Island

10h 52m

1 stop

BUF8:33 pmBuffalo

$1,130

Find similar

Frontier

Dec 26

BUF9:57 amBuffalo

9h 43m

1 stop

ISP7:40 pmIslip Long Island

Dec 27

ISP6:00 amIslip Long Island

11h 04m

1 stop

BUF5:04 pmBuffalo

$1,140

Find similar

Fly from

Fly to

Route

Depart

Return

Price

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Mon 1/12

9:08 am-7:51 pm

1 stop10h 43m

Islip Long Island

Fri 1/16

8:54 pm-7:11 pm

1 stop22h 17m

$289

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Mon 1/12

3:45 pm-9:55 pm

1 stop6h 10m

Islip Long Island

Fri 1/16

5:55 am-2:05 pm

2 stops8h 10m

$322

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Sat 5/23

5:35 am-1:10 pm

1 stop7h 35m

Islip Long Island

Mon 5/25

12:30 pm-7:45 pm

1 stop7h 15m

$346

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Sat 5/23

10:15 am-11:20 pm

2 stops13h 05m

Islip Long Island

Mon 5/25

12:30 pm-7:45 pm

1 stop7h 15m

$357

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Mon 1/12

7:30 am-9:55 pm

2 stops14h 25m

Islip Long Island

Fri 1/16

12:35 pm-10:30 pm

2 stops9h 55m

$363

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Sat 5/23

10:15 am-11:20 pm

2 stops13h 05m

Islip Long Island

Mon 5/25

12:30 pm-10:45 pm

2 stops10h 15m

$375

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Mon 1/19

10:11 am-7:50 pm

1 stop9h 39m

Islip Long Island

Mon 1/26

12:25 pm-8:18 pm

1 stop7h 53m

$382

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Mon 1/19

10:11 am-7:50 pm

1 stop9h 39m

Islip Long Island

Mon 1/26

11:05 am-11:47 pm

2 stops12h 42m

$427

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Mon 1/19

7:00 am-4:10 pm

2 stops9h 10m

Islip Long Island

Mon 1/26

11:05 am-11:47 pm

2 stops12h 42m

$686

BuffaloIslip

BUF - ISP

BUFISP

Buffalo

Thu 4/2

11:42 am-7:11 pm

1 stop7h 29m

Islip Long Island

Sun 4/5

9:41 am-8:33 pm

1 stop10h 52m

$1,130

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 12 resultsSorted by cheapest first

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

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 time of day to depart on your flight to Islip, New York?

Flying to Islip, New York from Buffalo in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $276 when looking at flights departing in the afternoon. Flights to Islip, New York are more costly in the morning, with an average ticket price of $346. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

When to book flights from Buffalo to Islip, New York

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

Estimated round-trip price

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

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

Fastest flight time	5h 50m
Direct flights	None

The fastest flight from Buffalo to Islip, New York takes 5h 50m

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

Search flight deals

How far is Buffalo to Islip Long Island by plane?
There are 327.4 mi between Buffalo and Islip Long Island. In terms of flight time, this usually takes a little over 5h 50m.
When did momondo last update prices for flights from Buffalo Airport to Islip Long Island Airport?
Prices for flights from Buffalo Airport to Islip Long Island Airport were last updated today.
How many operators does momondo search for flights from Buffalo Airport to Islip Long Island Airport?
As of December 2025, there is 1 operator available to choose from for flights from Buffalo Airport to Islip Long Island Airport.
How old do you have to be to fly from Buffalo Airport to Islip Long Island Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Buffalo Airport to Islip Long Island Airport.
What documentation or ID do you need to fly to Islip Long Island Airport?
The travel and health documents you'll need for your trip to Islip Long Island Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Islip Long Island Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Buffalo to Islip, New York?
momondo data reveals that the most frequently booked airline on the route from Buffalo to Islip, New York is Southwest, representing 100% of all bookings.

Best airlines flying from Buffalo to Islip, New York

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

Airline	Rating	Free Cancellation	Price
Southwest	PriceFrom $199	Free Cancellation	Rating 8.0 4,253 reviews		Search Southwest flights

Montauk

Riverhead

Sag Harbor

Southampton

Amagansett

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Buffalo to Islip. Millions of users trust and use momondo every year so you are in good hands.

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

Yes. momondo allows you to filter the results for Buffalo to Islip flights to just show those with flexible booking policies.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Islip from Buffalo.

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

Price alerts on flights to Islip from Buffalo are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.