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Cheap flights from Islip, New York to Buffalo from $130

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Islip, New York to Buffalo departing on 4/13. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Islip, New York to Buffalo

Cheap round-trip flights

Enter your travel dates to find the best prices.
Southwest Logo
9:00 am - 12:15 pm
ISP
-
BUF
3h 15m
1 stop
Southwest Logo
9:45 am - 1:50 pm
BUF
-
ISP
4h 05m
1 stop
$276Southwest
Tue, Apr 28 - Wed, Apr 29
Southwest Logo
9:00 am - 12:15 pm
ISP
-
BUF
3h 15m
1 stop
Southwest Logo
3:10 pm - 10:10 pm
BUF
-
ISP
7h 00m
2 stops
$281Southwest
Tue, Apr 28 - Wed, Apr 29
Southwest Logo
6:30 am - 3:20 pm
ISP
-
BUF
8h 50m
2 stops
Southwest Logo
3:10 pm - 10:10 pm
BUF
-
ISP
7h 00m
2 stops
$291Southwest
Tue, Apr 28 - Wed, Apr 29
Southwest Logo
9:00 am - 12:15 pm
ISP
-
BUF
3h 15m
1 stop
Southwest Logo
12:40 pm - 4:30 pm
BUF
-
ISP
3h 50m
1 stop
$296Southwest
Tue, Apr 28 - Thu, Apr 30
Southwest Logo
12:30 pm - 8:25 pm
ISP
-
BUF
7h 55m
2 stops
Southwest Logo
12:40 pm - 4:30 pm
BUF
-
ISP
3h 50m
1 stop
$306Southwest
Tue, Apr 28 - Thu, Apr 30
Southwest Logo
2:00 pm - 5:35 pm
ISP
-
BUF
3h 35m
1 stop
Southwest Logo
5:55 pm - 11:55 pm
BUF
-
ISP
6h 00m
1 stop
$307Southwest
Fri, Mar 20 - Mon, Mar 23
Southwest Logo
5:55 pm - 12:10 am
ISP
-
BUF
6h 15m
1 stop
Southwest Logo
5:55 pm - 11:55 pm
BUF
-
ISP
6h 00m
1 stop
$324Southwest
Fri, Mar 13 - Mon, Mar 16
Southwest Logo
4:45 pm - 9:20 pm
ISP
-
BUF
4h 35m
1 stop
Southwest Logo
5:05 am - 11:10 am
BUF
-
ISP
6h 05m
1 stop
$329Southwest
Sun, May 24 - Sun, May 31
Southwest Logo
4:45 pm - 9:20 pm
ISP
-
BUF
4h 35m
1 stop
Southwest Logo
2:55 pm - 11:45 pm
BUF
-
ISP
8h 50m
2 stops
$334Southwest
Sun, May 24 - Sun, May 31
Multiple Airlines Logo
11:50 am - 12:05 pm
ISP
-
BUF
24h 15m
2 stops
Multiple Airlines Logo
11:44 am - 7:59 pm
BUF
-
ISP
8h 15m
1 stop
$338Multiple Airlines
Wed, Mar 25 - Wed, Apr 1

Southwest flights from Islip, New York to Buffalo

Our best Southwest deals on Islip, New York to Buffalo flight tickets
Southwest
Apr 28
ISP9:00 amIslip Long Island
3h 15m
1 stop
BUF12:15 pmBuffalo
Apr 29
BUF9:45 amBuffalo
4h 05m
1 stop
ISP1:50 pmIslip Long Island
$276
Southwest
Apr 28
ISP9:00 amIslip Long Island
3h 15m
1 stop
BUF12:15 pmBuffalo
Apr 29
BUF3:10 pmBuffalo
7h 00m
2 stops
ISP10:10 pmIslip Long Island
$281
Southwest
Apr 28
ISP6:30 amIslip Long Island
8h 50m
2 stops
BUF3:20 pmBuffalo
Apr 29
BUF3:10 pmBuffalo
7h 00m
2 stops
ISP10:10 pmIslip Long Island
$291

Frontier flights from Islip, New York to Buffalo

Our best Frontier deals on Islip, New York to Buffalo flight tickets
Frontier
Mar 6
ISP1:42 pmIslip Long Island
6h 48m
1 stop
BUF8:30 pmBuffalo
Mar 8
BUF9:34 amBuffalo
6h 49m
1 stop
ISP4:23 pmIslip Long Island
$559
Frontier
Mar 1
ISP5:51 pmIslip Long Island
16h 58m
1 stop
BUF10:49 amBuffalo
Mar 7
BUF9:25 pmBuffalo
17h 58m
1 stop
ISP3:23 pmIslip Long Island
$579
Frontier
Apr 3
ISP11:51 amIslip Long Island
8h 24m
1 stop
BUF8:15 pmBuffalo
Apr 5
BUF8:59 pmBuffalo
12h 29m
1 stop
ISP9:28 amIslip Long Island
$684

momondo Fare Finder

 
Customize your flight search to find flights from Islip, New York 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, momondo users made 832,500 searches. Data last updated February 27, 2026.
Use the filters below to find and compare flights from Islip, New York to Buffalo that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Tue 4/28

9:00 am-12:15 pm

1 stop3h 15m

Buffalo

Wed 4/29

9:45 am-1:50 pm

1 stop4h 05m

$276

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Tue 4/28

9:00 am-12:15 pm

1 stop3h 15m

Buffalo

Wed 4/29

3:10 pm-10:10 pm

2 stops7h 00m

$281

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Tue 4/28

6:30 am-3:20 pm

2 stops8h 50m

Buffalo

Wed 4/29

3:10 pm-10:10 pm

2 stops7h 00m

$291

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Tue 4/28

9:00 am-12:15 pm

1 stop3h 15m

Buffalo

Thu 4/30

12:40 pm-4:30 pm

1 stop3h 50m

$296

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Tue 4/28

12:30 pm-8:25 pm

2 stops7h 55m

Buffalo

Thu 4/30

12:40 pm-4:30 pm

1 stop3h 50m

$306

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Fri 3/20

2:00 pm-5:35 pm

1 stop3h 35m

Buffalo

Mon 3/23

5:55 pm-11:55 pm

1 stop6h 00m

$307

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Fri 3/13

5:55 pm-12:10 am

1 stop6h 15m

Buffalo

Mon 3/16

5:55 pm-11:55 pm

1 stop6h 00m

$324

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Sun 5/24

4:45 pm-9:20 pm

1 stop4h 35m

Buffalo

Sun 5/31

5:05 am-11:10 am

1 stop6h 05m

$329

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Sun 5/24

4:45 pm-9:20 pm

1 stop4h 35m

Buffalo

Sun 5/31

2:55 pm-11:45 pm

2 stops8h 50m

$334

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Wed 3/25

11:50 am-12:05 pm

2 stops24h 15m

Buffalo

Wed 4/1

11:44 am-7:59 pm

1 stop8h 15m

$338

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Buffalo from

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

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 $200. Flights from Islip, New York to Buffalo on a Sunday will generally be more expensive and average around $233. 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 $215. Flying to Buffalo in the morning is an ideal time because this is during off-peak travel hours. In the afternoon is when there is more demand to fly to Buffalo, so prices are often more expensive at around $241 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

3h 15m

Direct flights

None
The fastest flight from Islip, New York to Buffalo takes 3h 15m
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 3h 15m.

  • 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?

  • 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?

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
SouthwestPriceFrom $183Free CancellationRating
8.0
4,301 reviews
Search Southwest flights

Traveling to a place near Buffalo?

Book flights to Buffalo if you plan to visit one of these locations
Batavia
Cheektowaga
Amherst
Grand Island
Tonawanda
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.

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