$198+ 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 12/31. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — ISP
Nov 13 — Nov 201
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 October 14, 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 14, 2026.
This Southwest deal was found by Cheapflights users on 10/12. 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 10/277:25 am -
1 stop5h 45m
Sat 10/316:00 am -
2 stops11h 55m
Deal found 10/12![Southwest logo]()
$376
This Southwest deal was found by Cheapflights users on 10/9. 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.
Wed 11/255:40 pm -
1 stop6h 10m
Sat 11/285:05 pm -
1 stop7h 10m
Deal found 10/9![Southwest logo]()
$442
This Southwest deal was found by Cheapflights users on 10/9. 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.
Mon 11/3011:35 am -
1 stop4h 45m
Tue 12/14:05 pm -
1 stop5h 55m
Deal found 10/9![Southwest logo]()
$467
This Southwest deal was found by Cheapflights users on 10/13. 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 11/2412:20 pm -
1 stop11h 20m
Mon 11/304:55 pm -
1 stop6h 55m
Deal found 10/13![Southwest logo]()
$508
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 14, 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 14, 2026.
This Southwest deal was found by Cheapflights users on 10/11. 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 1/810:25 am -
2 stops11h 05m
Mon 1/115:45 am -
1 stop6h 15m
Deal found 10/11![Southwest logo]()
$222
This Southwest deal was found by Cheapflights users on 10/11. 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 1/83:45 pm -
1 stop5h 45m
Sun 1/105:45 am -
1 stop6h 15m
Deal found 10/11![Southwest logo]()
$236
This Southwest deal was found by Cheapflights users on 10/12. 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 10/277:25 am -
1 stop5h 45m
Sat 10/316:00 am -
2 stops11h 55m
Deal found 10/12![Southwest logo]()
$376
This Southwest deal was found by Cheapflights users on 10/9. 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.
Wed 11/255:40 pm -
1 stop6h 10m
Sat 11/285:05 pm -
1 stop7h 10m
Deal found 10/9![Southwest logo]()
$442
This Southwest deal was found by Cheapflights users on 10/9. 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.
Mon 11/3011:35 am -
1 stop4h 45m
Tue 12/14:05 pm -
1 stop5h 55m
Deal found 10/9![Southwest logo]()
$467
This Southwest deal was found by Cheapflights users on 10/13. 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 11/2412:20 pm -
1 stop11h 20m
Mon 11/304:55 pm -
1 stop6h 55m
Deal found 10/13![Southwest logo]()
$508
Last-minute flights from Buffalo to IslipDiscover last-minute flight deals from Buffalo to Islip. Data last updated October 14, 2026 and is based on user searches.
Discover last-minute flight deals from Buffalo to Islip. Data last updated October 14, 2026 and is based on user searches.
This Southwest deal was found by Cheapflights users on 10/12. 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 10/277:25 am -
1 stop5h 45m
Sat 10/316:00 am -
2 stops11h 55m
Deal found 10/12![Southwest logo]()
$376
This Southwest deal was found by Cheapflights users on 10/13. 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 11/2412:20 pm -
1 stop11h 20m
Mon 11/304:55 pm -
1 stop6h 55m
Deal found 10/13![Southwest logo]()
$508
This Southwest deal was found by Cheapflights users on 10/9. 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.
Wed 11/255:40 pm -
1 stop6h 10m
Sat 11/285:05 pm -
1 stop7h 10m
Deal found 10/9![Southwest logo]()
$442
This Southwest deal was found by Cheapflights users on 10/9. 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.
Mon 11/3011:35 am -
1 stop4h 45m
Tue 12/14:05 pm -
1 stop5h 55m
Deal found 10/9![Southwest logo]()
$467
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 14, 2026.
Search for one-way flight options from Buffalo to Islip. Find affordable one-way fares based on user searches. Data last updated October 14, 2026.
This Frontier deal was found by Cheapflights users on 10/13. 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 12/317:41 pm -
1 stop13h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/13![Frontier logo]()
$198
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 14, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $217 (Southwest) |
One-way from | $198 (Frontier) |
Popular in | October |
Cheapest in | January |
Average price | $299 |
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 14, 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 12/31
7:41 pm-9:01 am
1 stop13h 20m
Islip Long Island
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$198
BuffaloIslip
BUF Buffalo - ISP Islip Long Island
BUFISP
Buffalo
Fri 1/8
10:25 am-9:30 pm
2 stops11h 05m
Islip Long Island
Mon 1/11
5:45 am-12:00 pm
1 stop6h 15m
$222
BuffaloIslip
BUF Buffalo - ISP Islip Long Island
BUFISP
Buffalo
Fri 1/8
3:45 pm-9:30 pm
1 stop5h 45m
Islip Long Island
Sun 1/10
5:45 am-12:00 pm
1 stop6h 15m
$236
BuffaloIslip
BUF Buffalo - ISP Islip Long Island
BUFISP
Buffalo
Tue 10/27
7:25 am-1:10 pm
1 stop5h 45m
Islip Long Island
Sat 10/31
6:00 am-5:55 pm
2 stops11h 55m
$376
BuffaloIslip
BUF Buffalo - ISP Islip Long Island
BUFISP
Buffalo
Wed 11/25
5:40 pm-11:50 pm
1 stop6h 10m
Islip Long Island
Sat 11/28
5:05 pm-12:15 am
1 stop7h 10m
$442
Quickest round-trip
BuffaloIslip
BUF Buffalo - ISP Islip Long Island
BUFISP
Buffalo
Mon 11/30
11:35 am-4:20 pm
1 stop4h 45m
Islip Long Island
Tue 12/1
4:05 pm-10:00 pm
1 stop5h 55m
$467
BuffaloIslip
BUF Buffalo - ISP Islip Long Island
BUFISP
Buffalo
Tue 11/24
12:20 pm-11:40 pm
1 stop11h 20m
Islip Long Island
Mon 11/30
4:55 pm-11:50 pm
1 stop6h 55m
$508
Sorted 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 14, 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.
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Crew
8.6
Food
7.0
Overall
7.9
Reviews
1 / 20
6.0
GoodSharilynn,May 2024
HOU - LGA
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Crew
8.6
Food
7.0
Overall
7.9
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
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
Alternative routes for Buffalo to Islip
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Islip by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Buffalo to Islip by cabin class
Find flights from Buffalo to Islip, based on your preferred cabin class, be it economy, premium economy, business, or first class.
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 14, 2026.
Buffalo and Islip flights
Browse other Buffalo and Islip flight options. Last updated on October 14, 2026.
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 14, 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 14, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$180 | Average$348 | FlexibilityNo cancel fee | On-time63% |