$98+ Cheap flights from Islip, NY to Buffalo (ISP - BUF)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/5. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — BUF
Nov 25 — Dec 21
Round-trip
1 adult, Economy
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Find cheap flights from Islip to Buffalo with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Islip to Buffalo
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Best
Last-minute
One-way
Cheapest flights from Islip to BuffaloExplore the most affordable flight options available from Islip to Buffalo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 26, 2026.
Explore the most affordable flight options available from Islip to Buffalo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 26, 2026.
This Southwest deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/189:25 am -
1 stop13h 10m
Sun 12/205:05 am -
1 stop12h 15m
Deal found 10/25![Southwest logo]()
$263
This Southwest deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1212:25 pm -
2 stops8h 50m
Mon 11/1612:45 pm -
1 stop3h 30m
Deal found 10/23![Southwest logo]()
$306
This Southwest deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates ” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/712:45 pm -
2 stops10h 50m
Wed 11/1112:45 pm -
1 stop3h 30m
Deal found 10/23![Southwest logo]()
$308
This Southwest deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/196:00 pm -
1 stop6h 55m
Sun 12/275:40 pm -
1 stop6h 10m
Deal found 10/24![Southwest logo]()
$349
This Southwest deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1812:30 pm -
1 stop5h 40m
Wed 11/255:40 pm -
1 stop6h 10m
Deal found 10/21![Southwest logo]()
$354
This Southwest deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/85:35 am -
1 stop6h 25m
Thu 11/125:05 am -
1 stop7h 35m
Deal found 10/24![Southwest logo]()
$399
This Southwest deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/51:35 pm -
2 stops9h 50m
Mon 11/95:30 pm -
1 stop6h 05m
Deal found 10/21![Southwest logo]()
$404
Best flights from Islip to BuffaloDiscover carefully curated flight deals from Islip to Buffalo that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 26, 2026.
Discover carefully curated flight deals from Islip to Buffalo that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 26, 2026.
This Southwest deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/712:45 pm -
2 stops10h 50m
Wed 11/1112:45 pm -
1 stop3h 30m
Deal found 10/23![Southwest logo]()
$308
This Southwest deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/189:25 am -
1 stop13h 10m
Sun 12/2012:40 pm -
2 stops11h 10m
Deal found 10/25![Southwest logo]()
$322
This Southwest deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/196:00 pm -
1 stop6h 55m
Sun 12/275:40 pm -
1 stop6h 10m
Deal found 10/24![Southwest logo]()
$349
This Southwest deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1812:30 pm -
1 stop5h 40m
Wed 11/255:40 pm -
1 stop6h 10m
Deal found 10/21![Southwest logo]()
$354
This Southwest deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/85:35 am -
1 stop6h 25m
Thu 11/125:05 am -
1 stop7h 35m
Deal found 10/24![Southwest logo]()
$399
This Southwest deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/51:35 pm -
2 stops9h 50m
Mon 11/95:30 pm -
1 stop6h 05m
Deal found 10/21![Southwest logo]()
$404
This Southwest deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/249:25 am -
1 stop13h 10m
Tue 12/112:45 pm -
1 stop3h 30m
Deal found 10/25![Southwest logo]()
$404
This Southwest deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/712:45 pm -
2 stops10h 50m
Mon 11/95:30 pm -
1 stop6h 05m
Deal found 10/23![Southwest logo]()
$414
Last-minute flights from Islip to BuffaloDiscover last-minute flight deals from Islip to Buffalo. Data last updated October 26, 2026 and is based on user searches.
Discover last-minute flight deals from Islip to Buffalo. Data last updated October 26, 2026 and is based on user searches.
This Southwest deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/51:35 pm -
2 stops9h 50m
Mon 11/95:30 pm -
1 stop6h 05m
Deal found 10/21![Southwest logo]()
$404
This Southwest deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/712:45 pm -
2 stops10h 50m
Wed 11/1112:45 pm -
1 stop3h 30m
Deal found 10/23![Southwest logo]()
$308
This Southwest deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/712:45 pm -
2 stops10h 50m
Mon 11/95:30 pm -
1 stop6h 05m
Deal found 10/23![Southwest logo]()
$414
This Southwest deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/85:35 am -
1 stop6h 25m
Thu 11/125:05 am -
1 stop7h 35m
Deal found 10/24![Southwest logo]()
$399
This Southwest deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1212:25 pm -
2 stops8h 50m
Mon 11/1612:45 pm -
1 stop3h 30m
Deal found 10/23![Southwest logo]()
$306
This Southwest deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1812:30 pm -
1 stop5h 40m
Wed 11/255:40 pm -
1 stop6h 10m
Deal found 10/21![Southwest logo]()
$354
One-way flights from Islip to BuffaloSearch for one-way flight options from Islip to Buffalo. Find affordable one-way fares based on user searches. Data last updated October 26, 2026.
Search for one-way flight options from Islip to Buffalo. Find affordable one-way fares based on user searches. Data last updated October 26, 2026.
This Southwest deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/53:00 pm -
1 stop8h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![Southwest logo]()
$98
This Southwest deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1812:30 pm -
1 stop4h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![Southwest logo]()
$100
This CheapOair deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/316:33 pm -
1 stop24h 19m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![Frontier logo]()
$151
This Kiwi.com deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1812:00 pm -
3 stops25h 49m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![Multiple Airlines logo]()
$211
This Kiwi.com deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/3112:00 pm -
2 stops30h 52m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![Multiple Airlines logo]()
$291
This Southwest deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/295:50 am -
1 stop6h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![Southwest logo]()
$340
This KAYAK deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/219:40 am -
1 stop9h 51m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![JetBlue logo]()
$457
This KAYAK deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/309:40 am -
1 stop9h 51m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![JetBlue logo]()
$637
This JetBlue deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/2912:36 pm -
1 stop10h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![JetBlue logo]()
$730
Find flight deals from Islip to Buffalo
Discover tips and strategies to find the most affordable flight options for your journey from Islip (ISP) to Buffalo (BUF). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated October 26, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $263 (Southwest) |
One-way from | $98 (Southwest) |
Popular in | October |
Cheapest in | February |
Average price | $316 |
Cheapflights Fare Finder
Customize your flight search to find flights from Islip 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, Cheapflights users made 7,457,451 searches. Data last updated October 26, 2026.
Use the filters below to find and compare flights from Islip to Buffalo that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
IslipBuffalo
ISP Islip Long Island - BUF Buffalo
ISPBUF
Islip Long Island
Wed 11/18
12:30 pm-4:30 pm
1 stop4h 00m
Buffalo
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$100
IslipBuffalo
ISP Islip Long Island - BUF Buffalo
ISPBUF
Islip Long Island
Sat 12/5
12:45 pm-11:30 pm
2 stops10h 45m
Buffalo
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$104
IslipBuffalo
ISP Islip Long Island - BUF Buffalo
ISPBUF
Islip Long Island
Wed 11/18
12:00 pm-1:49 pm
3 stops25h 49m
Buffalo
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$211
IslipBuffalo
ISP Islip Long Island - BUF Buffalo
ISPBUF
Islip Long Island
Sat 10/31
12:00 pm-6:52 pm
2 stops30h 52m
Buffalo
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$291
IslipBuffalo
ISP Islip Long Island - BUF Buffalo
ISPBUF
Islip Long Island
Sat 11/7
12:45 pm-11:35 pm
2 stops10h 50m
Buffalo
Wed 11/11
12:45 pm-4:15 pm
1 stop3h 30m
$308
IslipBuffalo
ISP Islip Long Island - BUF Buffalo
ISPBUF
Islip Long Island
Fri 12/18
9:25 am-10:35 pm
1 stop13h 10m
Buffalo
Sun 12/20
12:40 pm-11:50 pm
2 stops11h 10m
$322
IslipBuffalo
ISP Islip Long Island - BUF Buffalo
ISPBUF
Islip Long Island
Sun 11/29
5:50 am-12:20 pm
1 stop6h 30m
Buffalo
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$340
IslipBuffalo
ISP Islip Long Island - BUF Buffalo
ISPBUF
Islip Long Island
Sat 12/19
6:00 pm-12:55 am
1 stop6h 55m
Buffalo
Sun 12/27
5:40 pm-11:50 pm
1 stop6h 10m
$349
IslipBuffalo
ISP Islip Long Island - BUF Buffalo
ISPBUF
Islip Long Island
Wed 11/18
12:30 pm-6:10 pm
1 stop5h 40m
Buffalo
Wed 11/25
5:40 pm-11:50 pm
1 stop6h 10m
$354
IslipBuffalo
ISP Islip Long Island - BUF Buffalo
ISPBUF
Islip Long Island
Sun 11/8
5:35 am-12:00 pm
1 stop6h 25m
Buffalo
Thu 11/12
5:05 am-12:40 pm
1 stop7h 35m
$399
Showing 1-10 of 16 resultsSorted by cheapest first
Compare providers for flights from Islip to Buffalo
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Islip to Buffalo in October.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Islip, New York-Buffalo flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Islip, New York-Buffalo flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Islip, New York-Buffalo flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Islip, New York-Buffalo flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Islip, New York-Buffalo flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Islip to Buffalo
Have a flexible travel schedule? Discover the best time to fly to Buffalo from Islip with our price prediction graph.
ISP-BUF
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Related info for your journey
Find useful and relevant information for your journey from Islip to Buffalo. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Buffalo?
Book flights to Buffalo if you plan to visit one of these locationsCheektowaga
Lockport
Amherst
Williamsville
Orchard Park
Eden
Bowmansville
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