$100+ Cheap flights from Buffalo to Islip, NY (BUF - ISP)
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 11/12. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — ISP
Nov 3 — Nov 101
Round-trip
1 adult, Economy
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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
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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
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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 October 4, 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 October 4, 2026.
This Southwest deal was found by Cheapflights users on 10/3. 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 11/64:00 pm -
2 stops7h 35m
Sat 11/712:45 pm -
2 stops10h 50m
Deal found 10/3![Southwest logo]()
$310
This Southwest deal was found by Cheapflights users on 10/2. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/176:00 am -
1 stop5h 55m
Wed 10/219:40 am -
1 stop5h 40m
Deal found 10/2![Southwest logo]()
$371
This Southwest deal was found by Cheapflights users on 9/29. 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 11/65:30 pm -
1 stop6h 05m
Mon 11/95:35 am -
1 stop6h 25m
Deal found 9/29![Southwest logo]()
$384
This Southwest deal was found by Cheapflights users on 10/3. 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.
Sun 10/185:50 am -
1 stop4h 30m
Thu 10/225:40 pm -
1 stop6h 05m
Deal found 10/3![Southwest logo]()
$399
This Southwest deal was found by Cheapflights users on 10/1. 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.
Fri 10/162:50 pm -
1 stop8h 50m
Tue 10/2012:50 pm -
1 stop5h 30m
Deal found 10/1![Southwest logo]()
$404
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 October 4, 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 October 4, 2026.
This Southwest deal was found by Cheapflights users on 10/2. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/176:00 am -
1 stop5h 55m
Wed 10/219:40 am -
1 stop5h 40m
Deal found 10/2![Southwest logo]()
$371
This Southwest deal was found by Cheapflights users on 9/29. 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 11/65:30 pm -
1 stop6h 05m
Mon 11/95:35 am -
1 stop6h 25m
Deal found 9/29![Southwest logo]()
$384
This Southwest deal was found by Cheapflights users on 10/1. 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.
Fri 10/162:50 pm -
1 stop8h 50m
Tue 10/2012:50 pm -
1 stop5h 30m
Deal found 10/1![Southwest logo]()
$404
This Southwest deal was found by Cheapflights users on 10/2. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1412:35 pm -
1 stop3h 10m
Tue 10/2012:50 pm -
1 stop5h 30m
Deal found 10/2![Southwest logo]()
$485
Last-minute flights from Buffalo to IslipDiscover last-minute flight deals from Buffalo to Islip. Data last updated October 4, 2026 and is based on user searches.
Discover last-minute flight deals from Buffalo to Islip. Data last updated October 4, 2026 and is based on user searches.
This Southwest deal was found by Cheapflights users on 10/1. 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.
Fri 10/162:50 pm -
1 stop8h 50m
Tue 10/2012:50 pm -
1 stop5h 30m
Deal found 10/1![Southwest logo]()
$404
This Southwest deal was found by Cheapflights users on 10/2. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/176:00 am -
1 stop5h 55m
Wed 10/219:40 am -
1 stop5h 40m
Deal found 10/2![Southwest logo]()
$371
This Southwest deal was found by Cheapflights users on 10/3. 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.
Sun 10/185:50 am -
1 stop4h 30m
Thu 10/225:40 pm -
1 stop6h 05m
Deal found 10/3![Southwest logo]()
$399
This Southwest deal was found by Cheapflights users on 10/3. 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 11/64:00 pm -
2 stops7h 35m
Sat 11/712:45 pm -
2 stops10h 50m
Deal found 10/3![Southwest logo]()
$310
This Southwest deal was found by Cheapflights users on 9/29. 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 11/65:30 pm -
1 stop6h 05m
Mon 11/95:35 am -
1 stop6h 25m
Deal found 9/29![Southwest logo]()
$384
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 October 4, 2026.
Search for one-way flight options from Buffalo to Islip. Find affordable one-way fares based on user searches. Data last updated October 4, 2026.
This CheapOair deal was found by Cheapflights users on 9/30. 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.
Thu 11/1212:54 pm -
1 stop29h 02m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/30![Frontier logo]()
$100
This Southwest deal was found by Cheapflights users on 9/30. 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 11/125:20 am -
2 stops11h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/30![Southwest logo]()
$114
This Frontier deal was found by Cheapflights users on 9/29. 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 2/259:38 pm -
1 stop13h 26m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/29![Frontier logo]()
$160
This CheapOair deal was found by Cheapflights users on 9/29. 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.
Thu 10/1512:53 pm -
1 stop29h 07m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/29![Frontier logo]()
$165
This Frontier deal was found by Cheapflights users on 9/29. 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 12/207:41 pm -
1 stop13h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/29![Frontier logo]()
$195
This Southwest deal was found by Cheapflights users on 9/29. 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 11/2611:30 am -
1 stop5h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/29![Southwest logo]()
$204
This Southwest deal was found by Cheapflights users on 10/1. 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.
Fri 10/912:35 pm -
1 stop4h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/1![Southwest logo]()
$300
This Southwest deal was found by Cheapflights users on 9/30. 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 10/125:30 am -
2 stops9h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/30![Southwest logo]()
$305
This Kiwi.com deal was found by Cheapflights users on 9/30. 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.
Thu 11/1212:54 pm -
3 stops25h 28m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/30![Multiple Airlines logo]()
$306
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 October 4, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $310 (Southwest) |
One-way from | $100 (CheapOair) |
Popular in | October |
Cheapest in | February |
Average price | $295 |
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 7,457,451 searches. Data last updated October 4, 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 Buffalo - ISP Islip Long Island
BUFISP
Buffalo
Thu 11/12
5:20 am-5:05 pm
2 stops11h 45m
Islip Long Island
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$114
BuffaloIslip
BUF Buffalo - ISP Islip Long Island
BUFISP
Buffalo
Thu 2/25
9:38 pm-11:04 am
1 stop13h 26m
Islip Long Island
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$160
BuffaloIslip
BUF Buffalo - ISP Islip Long Island
BUFISP
Buffalo
Thu 10/15
12:53 pm-6:00 pm
1 stop29h 07m
Islip Long Island
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$165
BuffaloIslip
BUF Buffalo - ISP Islip Long Island
BUFISP
Buffalo
Sun 12/20
7:41 pm-9:01 am
1 stop13h 20m
Islip Long Island
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$195
BuffaloIslip
BUF Buffalo - ISP Islip Long Island
BUFISP
Buffalo
Thu 11/26
11:30 am-4:50 pm
1 stop5h 20m
Islip Long Island
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$204
BuffaloIslip
BUF Buffalo - ISP Islip Long Island
BUFISP
Buffalo
Fri 10/9
12:35 pm-5:00 pm
1 stop4h 25m
Islip Long Island
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$300
BuffaloIslip
BUF Buffalo - ISP Islip Long Island
BUFISP
Buffalo
Mon 10/12
6:00 am-11:45 am
1 stop5h 45m
Islip Long Island
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$300
Quickest round-trip
BuffaloIslip
BUF Buffalo - ISP Islip Long Island
BUFISP
Buffalo
Tue 10/13
4:25 pm-8:00 pm
1 stop3h 35m
Islip Long Island
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$300
BuffaloIslip
BUF Buffalo - ISP Islip Long Island
BUFISP
Buffalo
Sat 10/17
6:00 am-11:55 am
1 stop5h 55m
Islip Long Island
Wed 10/21
9:40 am-3:20 pm
1 stop5h 40m
$371
BuffaloIslip
BUF Buffalo - ISP Islip Long Island
BUFISP
Buffalo
Fri 11/6
5:30 pm-11:35 pm
1 stop6h 05m
Islip Long Island
Mon 11/9
5:35 am-12:00 pm
1 stop6h 25m
$384
Showing 1-10 of 12 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 October.
| 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.
Reviews of airlines servicing Islip
Get insights into the airlines that provide service to Islip. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Islip. Reviews last updated October 4, 2026.
Get a feel of what it's like to fly with Southwest from Buffalo to Islip by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.0
Entertainment
7.5
Overall
7.9
Boarding
8.1
Comfort
8.0
Crew
8.6
Reviews
1 / 20
6.0
GoodSharilynn,May 2024
HOU - LGA
Food
7.0
Entertainment
7.5
Overall
7.9
Boarding
8.1
Comfort
8.0
Crew
8.6
Reviews
1 / 20
6.0
GoodSharilynn,May 2024
HOU - LGA
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
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Other flights to Islip
Explore flights to Islip departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on October 4, 2026.
Buffalo and Islip flights
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Other flights from Buffalo
Browse through other flights departing from Buffalo. Flights are based on user searches made on Cheapflights and were last updated on October 4, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top airline flying from Buffalo to Islip
Discover the top airline that operate flights from Buffalo to Islip. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated October 4, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$180 | Average$348 | FlexibilityNo cancel fee | On-time63% |