$61 Cheap Flights from Buffalo (BUF) to Islip (ISP)

View $61 flight on Thu, Nov 13, 2025Opens in a new window

Popular airlines from Buffalo Niagara Intl. Airport (BUF) to MacArthur Airport (ISP)

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Cheap Flights from Buffalo to Islip (BUF-ISP)

Prices were available within the past 7 days and start at $61 for one-way flights and $120 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Thu, Nov 13 - Wed, Nov 19
BUF
Buffalo
ISP
Islip
$120 Roundtrip, found 2 hours ago
$120
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Thu, Nov 13 from Buffalo to Islip, returning Wed, Nov 19, priced at $120 found 2 hours ago
Frontier Airlines
Fri, Nov 14 - Wed, Nov 19
BUF
Buffalo
ISP
Islip
$153 Roundtrip, found 1 day ago
$153
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Fri, Nov 14 from Buffalo to Islip, returning Wed, Nov 19, priced at $153 found 1 day ago
Frontier Airlines
Thu, Nov 6 - Wed, Nov 19
BUF
Buffalo
ISP
Islip
$160 Roundtrip, found 1 hour ago
$160
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Thu, Nov 6 from Buffalo to Islip, returning Wed, Nov 19, priced at $160 found 1 hour ago
Frontier Airlines
Thu, Nov 13 - Sun, Nov 16
BUF
Buffalo
ISP
Islip
$173 Roundtrip, found 1 day ago
$173
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Thu, Nov 13 from Buffalo to Islip, returning Sun, Nov 16, priced at $173 found 1 day ago
Frontier Airlines
Thu, Nov 13 - Sat, Nov 15
BUF
Buffalo
ISP
Islip
$179 Roundtrip, found 1 day ago
$179
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Thu, Nov 13 from Buffalo to Islip, returning Sat, Nov 15, priced at $179 found 1 day ago
Frontier Airlines
Thu, Nov 6 - Sat, Nov 15
BUF
Buffalo
ISP
Islip
$180 Roundtrip, found 1 hour ago
$180
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Thu, Nov 6 from Buffalo to Islip, returning Sat, Nov 15, priced at $180 found 1 hour ago
Frontier Airlines
Thu, Nov 13 - Thu, Nov 20
BUF
Buffalo
ISP
Islip
$183 Roundtrip, found 2 hours ago
$183
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Thu, Nov 13 from Buffalo to Islip, returning Thu, Nov 20, priced at $183 found 2 hours ago
Frontier Airlines
Mon, Nov 3 - Wed, Nov 19
BUF
Buffalo
ISP
Islip
$190 Roundtrip, found 1 hour ago
$190
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Mon, Nov 3 from Buffalo to Islip, returning Wed, Nov 19, priced at $190 found 1 hour ago
Southwest Airlines
Fri, Dec 5 - Mon, Dec 8
BUF
Buffalo
ISP
Islip
$200 Roundtrip, found 1 day ago
$200
Roundtrip
found 1 day ago
Select Southwest Airlines flight, departing Fri, Dec 5 from Buffalo to Islip, returning Mon, Dec 8, priced at $200 found 1 day ago
JetBlue Airways
Tue, Dec 2 - Wed, Dec 10
BUF
Buffalo
ISP
Islip
$207 Roundtrip, found 21 hours ago
$207
Roundtrip
found 21 hours ago
Select JetBlue Airways flight, departing Tue, Dec 2 from Buffalo to Islip, returning Wed, Dec 10, priced at $207 found 21 hours ago

Alternative airports near Islip

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to MacArthur ISP. Cheapest and Closest option available. Average driving time to city center is 14 minutes. Flights from $120
ISP
MacArthur
CheapestClosest
Average driving time to city center14 min
Flights from $120

Frequently asked questions

How much does a flight from Buffalo Niagara Intl. Airport (BUF) to MacArthur Airport (ISP) cost?
Lock in a cheap one-way flight from $61 or cheap return flight from $120 from Buffalo Niagara Intl. Airport (BUF) to MacArthur Airport (ISP) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Buffalo Niagara Intl. Airport (BUF) to MacArthur Airport (ISP)?
Planning your trip for November can help you save, as it's the cheapest month for flights between BUF and ISP. You'll often find the lowest fares during off-peak months.
What is the cheapest airline that flies from Buffalo Niagara Intl. Airport (BUF) to MacArthur Airport (ISP)?
Expedia's filter tool lets you easily compare different airlines, departure times and fares all in one place. Select your preferences, then sort by "Price (lowest to highest)" to find the carrier with the cheapest BUF to ISP flight.
How many flights per day from Buffalo Niagara Intl. Airport (BUF) to MacArthur Airport (ISP)?
Nonstop flights from Buffalo Niagara Intl. Airport (BUF) to MacArthur Airport (ISP) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your dates and choose either "1 Stop" or "2+ Stops."
What day of the week has the most flights from BUF to ISP?
Typically you'll find the widest variety of flight choices on a Friday. Tuesdays are often the quietest.* But this can change based on the season, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Buffalo Niagara Intl. Airport (BUF) to MacArthur Airport (ISP)?
To land at MacArthur Airport (ISP) without delays, pick a flight that takes off from Buffalo Niagara Intl. Airport (BUF) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Islip from Buffalo Niagara Intl. Airport (BUF)?
If you're taking a direct flight from Buffalo Niagara Intl. Airport (BUF) to Islip, you can land at either LaGuardia Airport (LGA) or John F. Kennedy Intl. Airport (JFK).
Is it cheaper to buy a plane ticket from Buffalo Niagara Intl. Airport (BUF) to MacArthur Airport (ISP) last-minute?
Booking your flight from BUF to ISP right before your trip is usually more expensive. However, if you're flexible with your departure times and dates, you could snag a cheap last-minute fare.
Is it cheaper to book a BUF to ISP flight and hotel package?
Compared with arranging flights and hotels separately, booking a BUF to ISP flight and hotel package with Expedia could result in significant savings. What's more, having it all in one place will take the stress out of planning your trip. Just pick your flights and choose from our extensive range of hotels, then tailor your trip with extras like tours, activities and car rentals.
Can I cancel or change the date of my flight from Buffalo Niagara Intl. Airport (BUF) to MacArthur Airport (ISP)?
It's generally possible to cancel or reschedule your BUF to ISP flight. However, if the booking was made more than 24 hours ago, additional charges may apply. Check your airline's policies in your itinerary to see what changes are allowed and whether any costs are involved. You'll also find more details on our Customer Service portal.

Travel information

Origin airport
Buffalo Niagara Intl.
Destination airport
MacArthur
Airlines serving
Frontier Airlines, JetBlue Airways, Southwest Airlines
Roundtrip price
$120
Distance
325 mi

Book with confidence

Buffalo to Islip Flights

The cheapest times to fly from Buffalo to Islip

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Buffalo to Islip are during the month of November. You can find some of the cheapest flights from Buffalo to Islip with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Buffalo to Islip

Sunday is one of the best days to book for cheap flights from Buffalo to Islip: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Buffalo to Islip

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Buffalo to Islip in 2025. You can also book with separate airlines for your outbound and return journeys, from $61 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Buffalo to Islip flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Buffalo to Islip airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Buffalo to Islip Flights

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*Available to One Key members.