$101+ 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 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — BUF
Oct 10 — Oct 171
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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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 September 10, 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 September 10, 2026.
This Southwest deal was found by Cheapflights users on 9/8. 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 12/94:05 pm -
1 stop5h 50m
Thu 12/1012:45 pm -
1 stop3h 30m
Deal found 9/8![Southwest logo]()
$201
This Southwest deal was found by Cheapflights users on 9/6. 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 11/125:40 pm -
1 stop6h 05m
Sat 11/1410:10 am -
1 stop4h 45m
Deal found 9/6![Southwest logo]()
$253
This Southwest deal was found by Cheapflights users on 9/7. 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 12/212:30 pm -
1 stop4h 00m
Sun 12/68:15 am -
1 stop3h 30m
Deal found 9/7![Southwest logo]()
$287
This Southwest deal was found by Cheapflights users on 9/8. 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 10/165:40 pm -
1 stop6h 05m
Sun 10/185:50 am -
1 stop4h 30m
Deal found 9/8![Southwest logo]()
$304
This Southwest deal was found by Cheapflights users on 9/6. 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 10/155:40 pm -
1 stop6h 05m
Sun 10/185:50 am -
1 stop4h 30m
Deal found 9/6![Southwest logo]()
$320
This Southwest deal was found by Cheapflights users on 9/6. 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 11/612:25 pm -
1 stop7h 10m
Sun 11/88:15 am -
1 stop3h 30m
Deal found 9/6![Southwest logo]()
$325
This Southwest deal was found by Cheapflights users on 9/6. 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 9/265:30 am -
1 stop4h 25m
Tue 9/296:50 am -
1 stop8h 05m
Deal found 9/6![Southwest logo]()
$336
This Southwest deal was found by Cheapflights users on 9/9. 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 9/296:05 am -
2 stops9h 10m
Wed 9/308:55 am -
1 stop3h 15m
Deal found 9/9![Southwest logo]()
$341
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 September 10, 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 September 10, 2026.
This Southwest deal was found by Cheapflights users on 9/7. 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 12/212:30 pm -
1 stop4h 00m
Sun 12/68:15 am -
1 stop3h 30m
Deal found 9/7![Southwest logo]()
$287
This Southwest deal was found by Cheapflights users on 9/6. 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 11/126:00 am -
2 stops9h 25m
Sat 11/1410:10 am -
1 stop4h 45m
Deal found 9/6![Southwest logo]()
$292
This Southwest deal was found by Cheapflights users on 9/6. 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 10/155:40 pm -
1 stop6h 05m
Sun 10/185:50 am -
1 stop4h 30m
Deal found 9/6![Southwest logo]()
$320
This Southwest deal was found by Cheapflights users on 9/10. 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 10/185:40 am -
1 stop6h 00m
Sun 12/68:15 am -
1 stop3h 30m
Deal found 9/10![Southwest logo]()
$336
This Southwest deal was found by Cheapflights users on 9/9. 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 9/2910:55 am -
1 stop3h 25m
Wed 9/306:00 am -
1 stop4h 15m
Deal found 9/9![Southwest logo]()
$336
This Southwest deal was found by Cheapflights users on 9/6. 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 9/262:00 pm -
1 stop6h 35m
Tue 9/296:50 am -
2 stops10h 10m
Deal found 9/6![Southwest logo]()
$356
This Southwest deal was found by Cheapflights users on 9/6. 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 11/612:25 pm -
1 stop7h 10m
Sun 11/85:05 am -
2 stops10h 30m
Deal found 9/6![Southwest logo]()
$361
This Southwest deal was found by Cheapflights users on 9/7. 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 45m
Sun 11/85:05 am -
2 stops10h 30m
Deal found 9/7![Southwest logo]()
$394
Last-minute flights from Islip to BuffaloDiscover last-minute flight deals from Islip to Buffalo. Data last updated September 10, 2026 and is based on user searches.
Discover last-minute flight deals from Islip to Buffalo. Data last updated September 10, 2026 and is based on user searches.
This Southwest deal was found by Cheapflights users on 9/6. 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 9/265:30 am -
1 stop4h 25m
Tue 9/296:50 am -
1 stop8h 05m
Deal found 9/6![Southwest logo]()
$336
This Southwest deal was found by Cheapflights users on 9/9. 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 9/276:20 am -
1 stop5h 55m
Wed 9/308:55 am -
1 stop3h 15m
Deal found 9/9![Southwest logo]()
$384
This Southwest deal was found by Cheapflights users on 9/9. 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 9/296:05 am -
2 stops9h 10m
Wed 9/308:55 am -
1 stop3h 15m
Deal found 9/9![Southwest logo]()
$341
This Southwest deal was found by Cheapflights users on 9/8. 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 10/93:10 pm -
1 stop8h 35m
Wed 10/144:25 pm -
1 stop3h 35m
Deal found 9/8![Southwest logo]()
$379
This Southwest deal was found by Cheapflights users on 9/9. 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 10/1012:20 pm -
1 stop5h 15m
Tue 10/134:25 pm -
1 stop3h 35m
Deal found 9/9![Southwest logo]()
$369
This Southwest deal was found by Cheapflights users on 9/6. 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 10/155:40 pm -
1 stop6h 05m
Sun 10/185:50 am -
1 stop4h 30m
Deal found 9/6![Southwest logo]()
$320
This Southwest deal was found by Cheapflights users on 9/8. 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 10/165:40 pm -
1 stop6h 05m
Sun 10/185:50 am -
1 stop4h 30m
Deal found 9/8![Southwest logo]()
$304
This Southwest deal was found by Cheapflights users on 9/10. 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 10/185:40 am -
1 stop6h 00m
Sun 12/65:05 am -
2 stops10h 30m
Deal found 9/10![Southwest logo]()
$364
This Southwest deal was found by Cheapflights users on 9/9. 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 10/306:55 am -
1 stop9h 15m
Tue 11/311:20 am -
1 stop9h 45m
Deal found 9/9![Southwest logo]()
$374
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 September 10, 2026.
Search for one-way flight options from Islip to Buffalo. Find affordable one-way fares based on user searches. Data last updated September 10, 2026.
This Southwest deal was found by Cheapflights users on 9/8. 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 10/69:40 am -
1 stop5h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Southwest logo]()
$101
This Kiwi.com deal was found by Cheapflights users on 9/8. 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.
Tue 10/612:00 pm -
3 stops24h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Multiple Airlines logo]()
$162
This Frontier deal was found by Cheapflights users on 9/6. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/116:25 pm -
2 stops18h 34m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Frontier logo]()
$247
This Southwest deal was found by Cheapflights users on 9/6. 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 9/1812:35 pm -
1 stop5h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Southwest logo]()
$290
This Frontier deal was found by Cheapflights users on 9/6. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/86:25 pm -
2 stops19h 11m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Frontier logo]()
$327
This Kiwi.com deal was found by Cheapflights users on 9/6. 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.
Sun 11/294:40 pm -
1 stop27h 44m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Frontier logo]()
$354
This Kiwi.com deal was found by Cheapflights users on 9/6. 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.
Fri 9/1811:52 am -
3 stops25h 03m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Multiple Airlines logo]()
$396
This Kiwi.com deal was found by Cheapflights users on 9/6. 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.
Sun 11/296:49 pm -
3 stops25h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Multiple Airlines logo]()
$520
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 September 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $201 (Southwest) |
One-way from | $101 (Southwest) |
Popular in | August |
Cheapest in | February |
Average price | $269 |
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 September 10, 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
Tue 10/6
9:40 am-3:20 pm
1 stop5h 40m
Buffalo
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$101
IslipBuffalo
ISP Islip Long Island - BUF Buffalo
ISPBUF
Islip Long Island
Sun 10/11
6:25 pm-12:59 pm
2 stops18h 34m
Buffalo
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$247
IslipBuffalo
ISP Islip Long Island - BUF Buffalo
ISPBUF
Islip Long Island
Wed 12/2
12:30 pm-4:30 pm
1 stop4h 00m
Buffalo
Sun 12/6
8:15 am-11:45 am
1 stop3h 30m
$287
IslipBuffalo
ISP Islip Long Island - BUF Buffalo
ISPBUF
Islip Long Island
Fri 9/18
12:35 pm-6:25 pm
1 stop5h 50m
Buffalo
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$290
IslipBuffalo
ISP Islip Long Island - BUF Buffalo
ISPBUF
Islip Long Island
Thu 11/12
6:00 am-3:25 pm
2 stops9h 25m
Buffalo
Sat 11/14
10:10 am-2:55 pm
1 stop4h 45m
$292
IslipBuffalo
ISP Islip Long Island - BUF Buffalo
ISPBUF
Islip Long Island
Thu 10/15
5:40 pm-11:45 pm
1 stop6h 05m
Buffalo
Sun 10/18
5:50 am-10:20 am
1 stop4h 30m
$320
IslipBuffalo
ISP Islip Long Island - BUF Buffalo
ISPBUF
Islip Long Island
Thu 10/8
6:25 pm-1:36 pm
2 stops19h 11m
Buffalo
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$327
IslipBuffalo
ISP Islip Long Island - BUF Buffalo
ISPBUF
Islip Long Island
Sun 10/18
5:40 am-11:40 am
1 stop6h 00m
Buffalo
Sun 12/6
8:15 am-11:45 am
1 stop3h 30m
$336
IslipBuffalo
ISP Islip Long Island - BUF Buffalo
ISPBUF
Islip Long Island
Tue 9/29
10:55 am-2:20 pm
1 stop3h 25m
Buffalo
Wed 9/30
6:00 am-10:15 am
1 stop4h 15m
$336
IslipBuffalo
ISP Islip Long Island - BUF Buffalo
ISPBUF
Islip Long Island
Sun 11/29
4:40 pm-8:24 pm
1 stop27h 44m
Buffalo
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$354
Showing 1-10 of 13 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 September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | 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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