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Cheap flights from Islip, New York to Buffalo from $111

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 11/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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
10:57 am - 9:23 amISP  Islip Long Island-BUF Buffalo
22h 26m1 stop Orlando
Frontier Logo
9:29 pm - 9:53 amBUF  Buffalo-ISP Islip Long Island
12h 24m1 stop Orlando
$176Frontier
Sat, Aug 29 - Sun, Aug 30
Southwest Logo
3:20 pm - 9:10 pmISP  Islip Long Island-BUF Buffalo
5h 50m1 stop Baltimore/Washington
Southwest Logo
12:00 pm - 5:00 pmBUF  Buffalo-ISP Islip Long Island
5h 00m1 stop Baltimore/Washington
$221Southwest
Wed, Sep 9 - Wed, Sep 16
Southwest Logo
6:05 am - 12:30 pmISP  Islip Long Island-BUF Buffalo
6h 25m1 stop Baltimore/Washington
Southwest Logo
8:05 am - 5:00 pmBUF  Buffalo-ISP Islip Long Island
8h 55m2 stops Tampa Baltimore/Washington
$226Southwest
Wed, Sep 9 - Wed, Sep 16
Southwest Logo
12:35 pm - 10:15 pmISP  Islip Long Island-BUF Buffalo
9h 40m2 stops Baltimore/Washington Tampa
Southwest Logo
5:40 am - 9:40 amBUF  Buffalo-ISP Islip Long Island
4h 00m1 stop Baltimore/Washington
$234Southwest
Fri, Aug 28 - Mon, Aug 31
Frontier Logo
10:57 am - 6:09 pmISP  Islip Long Island-BUF Buffalo
7h 12m1 stop Orlando
Frontier Logo
9:29 pm - 9:53 amBUF  Buffalo-ISP Islip Long Island
12h 24m1 stop Orlando
$247Frontier
Fri, Sep 4 - Sun, Sep 6
Frontier Logo
10:57 am - 6:09 pmISP  Islip Long Island-BUF Buffalo
7h 12m1 stop Orlando
Frontier Logo
9:29 pm - 9:53 amBUF  Buffalo-ISP Islip Long Island
12h 24m1 stop Orlando
$268Frontier
Wed, Aug 19 - Sun, Aug 23
Southwest Logo
12:55 pm - 8:40 pmISP  Islip Long Island-BUF Buffalo
7h 45m2 stops Baltimore/Washington Chicago Midway
Southwest Logo
8:05 am - 5:00 pmBUF  Buffalo-ISP Islip Long Island
8h 55m2 stops Tampa Baltimore/Washington
$274Southwest
Wed, Sep 9 - Wed, Sep 16
Southwest Logo
6:10 am - 11:10 amISP  Islip Long Island-BUF Buffalo
5h 00m1 stop Baltimore/Washington
Southwest Logo
6:00 am - 10:15 amBUF  Buffalo-ISP Islip Long Island
4h 15m1 stop Baltimore/Washington
$291Southwest
Mon, Aug 24 - Tue, Aug 25
Southwest Logo
12:35 pm - 6:25 pmISP  Islip Long Island-BUF Buffalo
5h 50m1 stop Baltimore/Washington
Southwest Logo
5:40 am - 9:40 amBUF  Buffalo-ISP Islip Long Island
4h 00m1 stop Baltimore/Washington
$294Southwest
Fri, Aug 28 - Mon, Aug 31
Southwest Logo
1:15 pm - 10:45 pmISP  Islip Long Island-BUF Buffalo
9h 30m2 stops Palm Beach Intl Orlando
Southwest Logo
10:50 am - 2:30 pmBUF  Buffalo-ISP Islip Long Island
3h 40m1 stop Baltimore/Washington
$299Southwest
Fri, Sep 4 - Sat, Sep 5

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Frontier flights from Islip, New York to Buffalo

Our best Frontier deals on Islip, New York to Buffalo flight tickets
Frontier
Aug 29
ISP10:57 amIslip Long Island
22h 26m
1 stop
BUF9:23 amBuffalo
Aug 30
BUF9:29 pmBuffalo
12h 24m
1 stop
ISP9:53 amIslip Long Island
$176
Frontier
Sep 4
ISP10:57 amIslip Long Island
7h 12m
1 stop
BUF6:09 pmBuffalo
Sep 6
BUF9:29 pmBuffalo
12h 24m
1 stop
ISP9:53 amIslip Long Island
$247
Frontier
Aug 19
ISP10:57 amIslip Long Island
7h 12m
1 stop
BUF6:09 pmBuffalo
Aug 23
BUF9:29 pmBuffalo
12h 24m
1 stop
ISP9:53 amIslip Long Island
$268

Southwest flights from Islip, New York to Buffalo

Our best Southwest deals on Islip, New York to Buffalo flight tickets
Southwest
Sep 9
ISP3:20 pmIslip Long Island
5h 50m
1 stop
BUF9:10 pmBuffalo
Sep 16
BUF12:00 pmBuffalo
5h 00m
1 stop
ISP5:00 pmIslip Long Island
$221
Southwest
Sep 9
ISP6:05 amIslip Long Island
6h 25m
1 stop
BUF12:30 pmBuffalo
Sep 16
BUF8:05 amBuffalo
8h 55m
2 stops
ISP5:00 pmIslip Long Island
$226
Southwest
Aug 28
ISP12:35 pmIslip Long Island
9h 40m
2 stops
BUF10:15 pmBuffalo
Aug 31
BUF5:40 amBuffalo
4h 00m
1 stop
ISP9:40 amIslip Long Island
$234

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 August 5, 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

IslipBuffalo

ISP Islip Long Island - BUF Buffalo

ISPBUF

Islip Long Island

Sat 8/29

10:57 am-9:23 am

1 stop22h 26m

Buffalo

Sun 8/30

9:29 pm-9:53 am

1 stop12h 24m

$176

IslipBuffalo

ISP Islip Long Island - BUF Buffalo

ISPBUF

Islip Long Island

Wed 9/9

3:20 pm-9:10 pm

1 stop5h 50m

Buffalo

Wed 9/16

12:00 pm-5:00 pm

1 stop5h 00m

$221

IslipBuffalo

ISP Islip Long Island - BUF Buffalo

ISPBUF

Islip Long Island

Wed 9/9

6:05 am-12:30 pm

1 stop6h 25m

Buffalo

Wed 9/16

8:05 am-5:00 pm

2 stops8h 55m

$226

IslipBuffalo

ISP Islip Long Island - BUF Buffalo

ISPBUF

Islip Long Island

Fri 8/28

12:35 pm-10:15 pm

2 stops9h 40m

Buffalo

Mon 8/31

5:40 am-9:40 am

1 stop4h 00m

$234

IslipBuffalo

ISP Islip Long Island - BUF Buffalo

ISPBUF

Islip Long Island

Fri 9/4

10:57 am-6:09 pm

1 stop7h 12m

Buffalo

Sun 9/6

9:29 pm-9:53 am

1 stop12h 24m

$247

IslipBuffalo

ISP Islip Long Island - BUF Buffalo

ISPBUF

Islip Long Island

Wed 8/19

10:57 am-6:09 pm

1 stop7h 12m

Buffalo

Sun 8/23

9:29 pm-9:53 am

1 stop12h 24m

$268

IslipBuffalo

ISP Islip Long Island - BUF Buffalo

ISPBUF

Islip Long Island

Wed 9/9

12:55 pm-8:40 pm

2 stops7h 45m

Buffalo

Wed 9/16

8:05 am-5:00 pm

2 stops8h 55m

$274
Quickest round-trip

IslipBuffalo

ISP Islip Long Island - BUF Buffalo

ISPBUF

Islip Long Island

Mon 8/24

6:10 am-11:10 am

1 stop5h 00m

Buffalo

Tue 8/25

6:00 am-10:15 am

1 stop4h 15m

$291

IslipBuffalo

ISP Islip Long Island - BUF Buffalo

ISPBUF

Islip Long Island

Fri 8/28

12:35 pm-6:25 pm

1 stop5h 50m

Buffalo

Mon 8/31

5:40 am-9:40 am

1 stop4h 00m

$294

IslipBuffalo

ISP Islip Long Island - BUF Buffalo

ISPBUF

Islip Long Island

Fri 9/4

1:15 pm-10:45 pm

2 stops9h 30m

Buffalo

Sat 9/5

10:50 am-2:30 pm

1 stop3h 40m

$299

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 $229. Flights from Islip, New York to Buffalo on a Monday will generally be more expensive and average around $270. 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?

At noon is the cheapest time of day to fly from Islip, New York to Buffalo when you can find flight prices for as low as $234. Flying to Buffalo at noon 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 $276 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 20m

Direct flights

None
The fastest flight from Islip, New York to Buffalo takes 3h 20m
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 3h 20m.

  • 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 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.

Traveling to a place near Buffalo?

Book flights to Buffalo if you plan to visit one of these locations
Batavia
Cheektowaga
Amherst
Tonawanda
Williamsville
Orchard Park
Grand Island
Bowmansville
West Seneca
Lockport
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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