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Cheap flights from Islip, New York to Buffalo from $90

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 6/1. 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
6:00 am - 11:50 am
ISP
-
BUF
5h 50m
1 stop
Southwest Logo
5:00 pm - 11:20 pm
BUF
-
ISP
6h 20m
1 stop
$223Southwest
Sat, May 9 - Sat, May 9
Southwest Logo
6:00 am - 2:15 pm
ISP
-
BUF
8h 15m
2 stops
Southwest Logo
5:00 pm - 11:20 pm
BUF
-
ISP
6h 20m
1 stop
$228Southwest
Sat, May 9 - Sat, May 9
Frontier Logo
10:48 am - 7:12 pm
ISP
-
BUF
8h 24m
1 stop
Frontier Logo
9:02 pm - 10:03 am
BUF
-
ISP
13h 01m
1 stop
$230Frontier
Thu, Jun 11 - Sun, Jun 14
Frontier Logo
11:00 am - 6:46 pm
ISP
-
BUF
7h 46m
1 stop
Frontier Logo
7:31 pm - 10:05 am
BUF
-
ISP
14h 34m
1 stop
$249Frontier
Fri, May 8 - Fri, May 15
Frontier Logo
10:48 am - 9:20 pm
ISP
-
BUF
10h 32m
1 stop
Frontier Logo
9:02 pm - 10:03 am
BUF
-
ISP
13h 01m
1 stop
$250Frontier
Sat, Jun 13 - Sun, Jun 14
Frontier Logo
6:59 pm - 10:41 am
ISP
-
BUF
39h 42m
2 stops
Frontier Logo
7:31 pm - 10:05 am
BUF
-
ISP
14h 34m
1 stop
$256Frontier
Fri, May 8 - Fri, May 15
Southwest Logo
5:10 pm - 11:15 pm
ISP
-
BUF
6h 05m
1 stop
Southwest Logo
12:40 pm - 8:25 pm
BUF
-
ISP
7h 45m
1 stop
$259Southwest
Fri, May 8 - Fri, May 15
Frontier Logo
4:07 pm - 10:49 am
ISP
-
BUF
18h 42m
1 stop
Frontier Logo
7:31 pm - 10:05 am
BUF
-
ISP
14h 34m
1 stop
$260Frontier
Fri, May 1 - Fri, May 15
Frontier Logo
4:07 pm - 10:49 am
ISP
-
BUF
18h 42m
1 stop
Frontier Logo
2:49 pm - 5:58 pm
BUF
-
ISP
27h 09m
2 stops
$261Frontier
Fri, May 1 - Fri, May 15
Frontier Logo
11:12 am - 1:54 pm
ISP
-
BUF
26h 42m
2 stops
Frontier Logo
8:49 pm - 10:05 am
BUF
-
ISP
13h 16m
1 stop
$272Frontier
Thu, May 7 - Sun, May 10

Frontier flights from Islip, New York to Buffalo

Our best Frontier deals on Islip, New York to Buffalo flight tickets
Frontier
Jun 11
ISP10:48 amIslip Long Island
8h 24m
1 stop
BUF7:12 pmBuffalo
Jun 14
BUF9:02 pmBuffalo
13h 01m
1 stop
ISP10:03 amIslip Long Island
$230
Frontier
May 8
ISP11:00 amIslip Long Island
7h 46m
1 stop
BUF6:46 pmBuffalo
May 15
BUF7:31 pmBuffalo
14h 34m
1 stop
ISP10:05 amIslip Long Island
$249
Frontier
Jun 13
ISP10:48 amIslip Long Island
10h 32m
1 stop
BUF9:20 pmBuffalo
Jun 14
BUF9:02 pmBuffalo
13h 01m
1 stop
ISP10:03 amIslip Long Island
$250

Southwest flights from Islip, New York to Buffalo

Our best Southwest deals on Islip, New York to Buffalo flight tickets
Southwest
May 9
ISP6:00 amIslip Long Island
5h 50m
1 stop
BUF11:50 amBuffalo
May 9
BUF5:00 pmBuffalo
6h 20m
1 stop
ISP11:20 pmIslip Long Island
$223
Southwest
May 9
ISP6:00 amIslip Long Island
8h 15m
2 stops
BUF2:15 pmBuffalo
May 9
BUF5:00 pmBuffalo
6h 20m
1 stop
ISP11:20 pmIslip Long Island
$228
Southwest
May 8
ISP5:10 pmIslip Long Island
6h 05m
1 stop
BUF11:15 pmBuffalo
May 15
BUF12:40 pmBuffalo
7h 45m
1 stop
ISP8:25 pmIslip Long Island
$259

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 April 13, 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

Cheapest round-trip
Quickest round-trip

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Sat 5/9

6:00 am-11:50 am

1 stop5h 50m

Buffalo

Sat 5/9

5:00 pm-11:20 pm

1 stop6h 20m

$223

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Sat 5/9

6:00 am-2:15 pm

2 stops8h 15m

Buffalo

Sat 5/9

5:00 pm-11:20 pm

1 stop6h 20m

$228

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Thu 6/11

10:48 am-7:12 pm

1 stop8h 24m

Buffalo

Sun 6/14

9:02 pm-10:03 am

1 stop13h 01m

$230

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Fri 5/8

11:00 am-6:46 pm

1 stop7h 46m

Buffalo

Fri 5/15

7:31 pm-10:05 am

1 stop14h 34m

$249

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Sat 6/13

10:48 am-9:20 pm

1 stop10h 32m

Buffalo

Sun 6/14

9:02 pm-10:03 am

1 stop13h 01m

$250

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Fri 5/8

6:59 pm-10:41 am

2 stops39h 42m

Buffalo

Fri 5/15

7:31 pm-10:05 am

1 stop14h 34m

$256

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Fri 5/8

5:10 pm-11:15 pm

1 stop6h 05m

Buffalo

Fri 5/15

12:40 pm-8:25 pm

1 stop7h 45m

$259

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Fri 5/1

4:07 pm-10:49 am

1 stop18h 42m

Buffalo

Fri 5/15

7:31 pm-10:05 am

1 stop14h 34m

$260

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Fri 5/1

4:07 pm-10:49 am

1 stop18h 42m

Buffalo

Fri 5/15

2:49 pm-5:58 pm

2 stops27h 09m

$261

IslipBuffalo

ISP - BUF

ISPBUF

Islip Long Island

Thu 5/7

11:12 am-1:54 pm

2 stops26h 42m

Buffalo

Sun 5/10

8:49 pm-10:05 am

1 stop13h 16m

$272

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 $222. Flights from Islip, New York to Buffalo on a Sunday will generally be more expensive and average around $244. 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 evening is the cheapest time of day to fly from Islip, New York to Buffalo when you can find flight prices for as low as $227. Flying to Buffalo in the evening 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 $265 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

5h 45m

Direct flights

None
The fastest flight from Islip, New York to Buffalo takes 5h 45m
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

Frequently asked questions about flying from Islip, New York to Buffalo

  • 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 5h 45m.

  • 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
4,331 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
Orchard Park
Williamsville
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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