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Cheap flights from Islip, New York to Buffalo from $135

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 11/27. 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.
Frontier Logo
8:47 am - 11:25 amISP-BUF
26h 38m1 stop
Frontier Logo
6:37 pm - 10:18 amBUF-ISP
15h 41m1 stop
$186Frontier
Find Deal
Sat, Nov 22 - Tue, Nov 25
Frontier Logo
11:35 am - 7:23 pmISP-BUF
7h 48m1 stop
Frontier Logo
8:18 pm - 10:40 amBUF-ISP
14h 22m1 stop
$190Frontier
Find Deal
Thu, Jan 29 - Sun, Feb 1
Frontier Logo
8:29 pm - 2:15 pmISP-BUF
17h 46m1 stop
Frontier Logo
3:18 pm - 7:34 pmBUF-ISP
28h 16m1 stop
$201Frontier
Find Deal
Fri, Dec 5 - Mon, Dec 8
Multiple Airlines Logo
11:35 am - 7:23 pmISP-BUF
7h 48m1 stop
Multiple Airlines Logo
8:18 pm - 1:21 pmBUF-ISP
17h 03m2 stops
$214Multiple Airlines
Find Deal
Thu, Jan 29 - Sun, Feb 1
Frontier Logo
9:27 pm - 11:44 amISP-BUF
14h 17m1 stop
Frontier Logo
9:53 pm - 5:42 pmBUF-ISP
19h 49m1 stop
$221Frontier
Find Deal
Sun, Nov 16 - Mon, Nov 17
Frontier Logo
6:00 am - 8:58 amISP-BUF
26h 58m2 stops
Frontier Logo
6:37 pm - 10:18 amBUF-ISP
15h 41m1 stop
$226Frontier
Find Deal
Sat, Nov 22 - Tue, Nov 25
Southwest Logo
5:40 am - 2:20 pmISP-BUF
8h 40m1 stop
Southwest Logo
8:30 am - 3:00 pmBUF-ISP
6h 30m1 stop
$247Southwest
Find Deal
Fri, Dec 5 - Sat, Dec 6
Southwest Logo
6:00 am - 3:10 pmISP-BUF
9h 10m2 stops
Southwest Logo
5:50 am - 4:25 pmBUF-ISP
10h 35m2 stops
$274Southwest
Find Deal
Thu, Jan 29 - Sun, Feb 1
JetBlue Logo
10:44 am - 7:58 pmISP-BUF
9h 14m1 stop
JetBlue Logo
9:02 am - 5:56 pmBUF-ISP
8h 54m1 stop
$516JetBlue
Find Deal
Tue, Nov 18 - Sat, Nov 22
Multiple Airlines Logo
7:30 am - 9:00 pmISP-BUF
13h 30m3 stops
Multiple Airlines Logo
10:50 am - 7:45 pmBUF-ISP
8h 55m2 stops
$820Multiple Airlines
Find Deal
Tue, Nov 18 - Wed, Nov 19

Frontier flights from Islip, New York to Buffalo

Our best Frontier deals on Islip, New York to Buffalo flight tickets
Frontier
Nov 22
ISP8:47 amIslip Long Island
26h 38m
1 stop
BUF11:25 amBuffalo
Nov 25
BUF6:37 pmBuffalo
15h 41m
1 stop
ISP10:18 amIslip Long Island
$186
Find similar
Frontier
Jan 29
ISP11:35 amIslip Long Island
7h 48m
1 stop
BUF7:23 pmBuffalo
Feb 1
BUF8:18 pmBuffalo
14h 22m
1 stop
ISP10:40 amIslip Long Island
$190
Find similar
Frontier
Dec 5
ISP8:29 pmIslip Long Island
17h 46m
1 stop
BUF2:15 pmBuffalo
Dec 8
BUF3:18 pmBuffalo
28h 16m
1 stop
ISP7:34 pmIslip Long Island
$201
Find similar

JetBlue flights from Islip, New York to Buffalo

Our best JetBlue deals on Islip, New York to Buffalo flight tickets
JetBlue
Nov 18
ISP10:44 amIslip Long Island
9h 14m
1 stop
BUF7:58 pmBuffalo
Nov 22
BUF9:02 amBuffalo
8h 54m
1 stop
ISP5:56 pmIslip Long Island
$516
Find similar
JetBlue
Nov 7
ISP10:44 amIslip Long Island
10h 21m
1 stop
BUF9:05 pmBuffalo
Nov 10
BUF6:45 amBuffalo
8h 55m
1 stop
ISP3:40 pmIslip Long Island
$815
Find similar
JetBlue
Nov 8
ISP1:50 pmIslip Long Island
8h 22m
1 stop
BUF10:12 pmBuffalo
Nov 10
BUF6:45 amBuffalo
8h 55m
1 stop
ISP3:40 pmIslip Long Island
$865
Find similar

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 November 4, 2025.
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

Sat 11/22

8:47 am-11:25 am

1 stop26h 38m

Buffalo

Tue 11/25

6:37 pm-10:18 am

1 stop15h 41m

$186

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Thu 1/29

11:35 am-7:23 pm

1 stop7h 48m

Buffalo

Sun 2/1

8:18 pm-10:40 am

1 stop14h 22m

$190

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Fri 12/5

8:29 pm-2:15 pm

1 stop17h 46m

Buffalo

Mon 12/8

3:18 pm-7:34 pm

1 stop28h 16m

$201

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Thu 1/29

11:35 am-7:23 pm

1 stop7h 48m

Buffalo

Sun 2/1

8:18 pm-1:21 pm

2 stops17h 03m

$214

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

$221

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Sat 11/22

6:00 am-8:58 am

2 stops26h 58m

Buffalo

Tue 11/25

6:37 pm-10:18 am

1 stop15h 41m

$226

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Fri 12/5

5:40 am-2:20 pm

1 stop8h 40m

Buffalo

Sat 12/6

8:30 am-3:00 pm

1 stop6h 30m

$247

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Thu 1/29

6:00 am-3:10 pm

2 stops9h 10m

Buffalo

Sun 2/1

5:50 am-4:25 pm

2 stops10h 35m

$274

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Tue 11/18

10:44 am-7:58 pm

1 stop9h 14m

Buffalo

Sat 11/22

9:02 am-5:56 pm

1 stop8h 54m

$516

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Tue 11/18

7:30 am-9:00 pm

3 stops13h 30m

Buffalo

Wed 11/19

10:50 am-7:45 pm

2 stops8h 55m

$820

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 $197. Flights from Islip, New York to Buffalo on a Sunday will generally be more expensive and average around $229. 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 $214. 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

Direct flights

None
There are no direct flights from Islip, New York to Buffalo. There are no popular flight routes from Islip, New York to Buffalo.
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  • 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 40m.

  • 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 $213Free CancellationRating
8.0
4,239 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
Tonawanda
Grand Island
Williamsville
Orchard Park
Lockport
West Seneca
East Aurora
Bowmansville
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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