$83+ Cheap flights from Buffalo to Islip, NY (BUF - ISP)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — ISP
Sep 4 — Sep 111
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Buffalo to Islip 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 Buffalo to Islip
Cheapest
Best
Last-minute
One-way
Cheapest flights from Buffalo to IslipExplore the most affordable flight options available from Buffalo to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 5, 2026.
Explore the most affordable flight options available from Buffalo to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 5, 2026.
This Frontier deal was found by Cheapflights users on 8/1. 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.
Tue 8/259:29 pm -
1 stop12h 24m
Fri 8/2810:57 am -
1 stop7h 12m
Deal found 8/1![Frontier logo]()
$179
This Southwest deal was found by Cheapflights users on 8/4. 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 9/35:40 am -
1 stop4h 00m
Wed 9/96:05 am -
1 stop6h 25m
Deal found 8/4![Southwest logo]()
$221
This Southwest deal was found by Cheapflights users on 8/4. 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.
Mon 12/1412:45 pm -
1 stop3h 30m
Thu 1/145:45 am -
2 stops10h 20m
Deal found 8/4![Southwest logo]()
$232
This Frontier deal was found by Cheapflights users on 8/3. 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 8/279:29 pm -
1 stop12h 24m
Sat 8/2910:57 am -
1 stop7h 12m
Deal found 8/3![Frontier logo]()
$258
This Kiwi.com deal was found by Cheapflights users on 8/2. 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 9/19:29 pm -
1 stop12h 24m
Mon 9/77:09 pm -
1 stop14h 14m
Deal found 8/2![Frontier logo]()
$260
This Frontier deal was found by Cheapflights users on 8/1. 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.
Tue 8/189:29 pm -
1 stop12h 24m
Fri 8/2110:57 am -
1 stop7h 12m
Deal found 8/1![Frontier logo]()
$266
This Kiwi.com deal was found by Cheapflights users on 8/2. 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 9/19:29 pm -
2 stops16h 04m
Mon 9/77:09 pm -
1 stop14h 14m
Deal found 8/2![Multiple Airlines logo]()
$270
This Kiwi.com deal was found by Cheapflights users on 8/1. 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 8/296:54 pm -
1 stop14h 59m
Sat 9/57:09 pm -
2 stops39h 20m
Deal found 8/1![Frontier logo]()
$276
This Southwest deal was found by Cheapflights users on 8/1. 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 8/256:00 am -
1 stop6h 10m
Fri 8/2812:35 pm -
2 stops9h 40m
Deal found 8/1![Southwest logo]()
$277
This Southwest deal was found by Cheapflights users on 8/4. 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 9/35:40 am -
1 stop4h 00m
Tue 9/86:05 am -
1 stop6h 25m
Deal found 8/4![Southwest logo]()
$286
Best flights from Buffalo to IslipDiscover carefully curated flight deals from Buffalo to Islip that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 5, 2026.
Discover carefully curated flight deals from Buffalo to Islip that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 5, 2026.
This Southwest deal was found by Cheapflights users on 8/4. 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.
Mon 12/1412:45 pm -
1 stop3h 30m
Thu 1/145:45 am -
1 stop6h 15m
Deal found 8/4![Southwest logo]()
$221
This Frontier deal was found by Cheapflights users on 8/3. 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 8/279:29 pm -
1 stop12h 24m
Sat 8/2910:57 am -
1 stop7h 12m
Deal found 8/3![Frontier logo]()
$258
This Kiwi.com deal was found by Cheapflights users on 8/2. 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 9/19:29 pm -
1 stop12h 24m
Mon 9/77:09 pm -
1 stop14h 14m
Deal found 8/2![Frontier logo]()
$260
This Southwest deal was found by Cheapflights users on 8/1. 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.
Mon 8/243:55 pm -
1 stop6h 10m
Thu 8/276:10 am -
1 stop5h 00m
Deal found 8/1![Southwest logo]()
$291
This Southwest deal was found by Cheapflights users on 7/31. 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 9/46:00 am -
1 stop5h 55m
Sun 9/66:50 am -
1 stop3h 10m
Deal found 7/31![Southwest logo]()
$304
This Southwest deal was found by Cheapflights users on 8/4. 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 9/35:40 am -
1 stop4h 00m
Tue 9/86:05 am -
2 stops9h 20m
Deal found 8/4![Southwest logo]()
$309
This Southwest deal was found by Cheapflights users on 8/1. 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 8/2512:35 pm -
2 stops8h 30m
Fri 8/2812:35 pm -
2 stops9h 40m
Deal found 8/1![Southwest logo]()
$312
Last-minute flights from Buffalo to IslipDiscover last-minute flight deals from Buffalo to Islip. Data last updated August 5, 2026 and is based on user searches.
Discover last-minute flight deals from Buffalo to Islip. Data last updated August 5, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 8/1. 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.
Tue 8/189:29 pm -
1 stop12h 24m
Fri 8/2110:57 am -
1 stop7h 12m
Deal found 8/1![Frontier logo]()
$266
This Southwest deal was found by Cheapflights users on 7/31. 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.
Mon 8/243:55 pm -
1 stop6h 10m
Thu 8/276:10 am -
1 stop5h 00m
Deal found 7/31![Southwest logo]()
$291
This Frontier deal was found by Cheapflights users on 8/1. 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.
Tue 8/259:29 pm -
1 stop12h 24m
Fri 8/2810:57 am -
1 stop7h 12m
Deal found 8/1![Frontier logo]()
$179
This Southwest deal was found by Cheapflights users on 8/1. 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 8/256:00 am -
1 stop6h 10m
Fri 8/2812:35 pm -
2 stops9h 40m
Deal found 8/1![Southwest logo]()
$277
This Frontier deal was found by Cheapflights users on 8/3. 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 8/279:29 pm -
1 stop12h 24m
Sat 8/2910:57 am -
1 stop7h 12m
Deal found 8/3![Frontier logo]()
$258
This Kiwi.com deal was found by Cheapflights users on 8/1. 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 8/296:54 pm -
1 stop14h 59m
Sat 9/57:09 pm -
2 stops39h 20m
Deal found 8/1![Frontier logo]()
$276
This Kiwi.com deal was found by Cheapflights users on 8/2. 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 9/19:29 pm -
1 stop12h 24m
Mon 9/77:09 pm -
1 stop14h 14m
Deal found 8/2![Frontier logo]()
$260
This Kiwi.com deal was found by Cheapflights users on 8/2. 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 9/19:29 pm -
2 stops16h 04m
Mon 9/77:09 pm -
1 stop14h 14m
Deal found 8/2![Multiple Airlines logo]()
$270
This Southwest deal was found by Cheapflights users on 8/4. 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 9/35:40 am -
1 stop4h 00m
Wed 9/96:05 am -
1 stop6h 25m
Deal found 8/4![Southwest logo]()
$221
This Southwest deal was found by Cheapflights users on 8/4. 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 9/35:40 am -
1 stop4h 00m
Tue 9/86:05 am -
1 stop6h 25m
Deal found 8/4![Southwest logo]()
$286
One-way flights from Buffalo to IslipSearch for one-way flight options from Buffalo to Islip. Find affordable one-way fares based on user searches. Data last updated August 5, 2026.
Search for one-way flight options from Buffalo to Islip. Find affordable one-way fares based on user searches. Data last updated August 5, 2026.
This Frontier deal was found by Cheapflights users on 7/31. 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 10/158:54 pm -
1 stop12h 39m
Deal found 7/31![Frontier logo]()
$83
This Frontier deal was found by Cheapflights users on 8/1. 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 8/309:29 pm -
1 stop12h 24m
Deal found 8/1![Frontier logo]()
$94
This Frontier deal was found by Cheapflights users on 8/3. 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.
Tue 8/189:29 pm -
1 stop12h 24m
Deal found 8/3![Frontier logo]()
$122
This Frontier deal was found by Cheapflights users on 8/4. 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 8/239:29 pm -
1 stop12h 24m
Deal found 8/4![Frontier logo]()
$123
This Southwest deal was found by Cheapflights users on 8/3. 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 9/186:00 am -
1 stop5h 55m
Deal found 8/3![Southwest logo]()
$194
This Kiwi.com deal was found by Cheapflights users on 8/3. 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 8/1811:36 am -
2 stops23h 41m
Deal found 8/3![Multiple Airlines logo]()
$202
This Southwest deal was found by Cheapflights users on 8/3. 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 8/1411:25 am -
1 stop5h 00m
Deal found 8/3![Southwest logo]()
$290
This JetBlue deal was found by Cheapflights users on 8/2. 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.
Mon 8/244:16 pm -
1 stop7h 51m
Deal found 8/2![JetBlue logo]()
$332
This Kiwi.com deal was found by Cheapflights users on 8/3. 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 8/142:48 pm -
3 stops22h 45m
Deal found 8/3![Multiple Airlines logo]()
$357
Find flight deals from Buffalo to Islip
Discover tips and strategies to find the most affordable flight options for your journey from Buffalo (BUF) to Islip (ISP). 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 August 5, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $179 (Frontier) |
One-way from | $83 (Frontier) |
Popular in | September |
Cheapest in | January |
Average price | $219 |
Cheapflights Fare Finder
Customize your flight search to find flights from Buffalo to Islip 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 2,558,603 searches. Data last updated August 5, 2026.
Use the filters below to find and compare flights from Buffalo to Islip that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
BuffaloIslip
BUF - ISP
BUFISP
Buffalo
Mon 12/14
12:45 pm-4:15 pm
1 stop3h 30m
Islip Long Island
Thu 1/14
5:45 am-12:00 pm
1 stop6h 15m
$221
BuffaloIslip
BUF - ISP
BUFISP
Buffalo
Thu 8/27
9:29 pm-9:53 am
1 stop12h 24m
Islip Long Island
Sat 8/29
10:57 am-6:09 pm
1 stop7h 12m
$258
BuffaloIslip
BUF - ISP
BUFISP
Buffalo
Tue 9/1
9:29 pm-9:53 am
1 stop12h 24m
Islip Long Island
Mon 9/7
7:09 pm-9:23 am
1 stop14h 14m
$260
BuffaloIslip
BUF - ISP
BUFISP
Buffalo
Mon 8/24
3:55 pm-10:05 pm
1 stop6h 10m
Islip Long Island
Thu 8/27
6:10 am-11:10 am
1 stop5h 00m
$291
Quickest round-trip
BuffaloIslip
BUF - ISP
BUFISP
Buffalo
Fri 9/4
6:00 am-11:55 am
1 stop5h 55m
Islip Long Island
Sun 9/6
6:50 am-10:00 am
1 stop3h 10m
$304
BuffaloIslip
BUF - ISP
BUFISP
Buffalo
Thu 9/3
5:40 am-9:40 am
1 stop4h 00m
Islip Long Island
Tue 9/8
6:05 am-3:25 pm
2 stops9h 20m
$309
BuffaloIslip
BUF - ISP
BUFISP
Buffalo
Tue 8/25
12:35 pm-9:05 pm
2 stops8h 30m
Islip Long Island
Fri 8/28
12:35 pm-10:15 pm
2 stops9h 40m
$312
Cheapest one-way
BuffaloIslip
BUF - ISP
BUFISP
Buffalo
Thu 10/15
8:54 pm-9:33 am
1 stop12h 39m
$83
BuffaloIslip
BUF - ISP
BUFISP
Buffalo
Tue 9/1
9:29 pm-9:53 am
1 stop12h 24m
$83
BuffaloIslip
BUF - ISP
BUFISP
Buffalo
Sun 8/30
9:29 pm-9:53 am
1 stop12h 24m
$94
Showing 1-10 of 15 resultsSorted by cheapest first
Compare providers for flights from Buffalo to Islip
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 Buffalo to Islip in August.
| 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 Buffalo-Islip, New York flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Buffalo-Islip, New York flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Buffalo-Islip, New York flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Buffalo-Islip, New York 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 Buffalo-Islip, New York 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 Buffalo to Islip
Have a flexible travel schedule? Discover the best time to fly to Islip from Buffalo with our price prediction graph.
BUF-ISP
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 Buffalo to Islip. 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 Islip?
Book flights to Islip if you plan to visit one of these locationsRiverhead
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Islip flight routes
Other flight options
Other flights from Buffalo
Popular flights