$69 Cheap Flights from Buffalo (BUF) to San Juan (SJU)

View $69 flight on Sat, Dec 6, 2025Opens in a new window

Popular airlines from Buffalo Niagara Intl. Airport (BUF) to Luis Munoz Marin Intl. Airport (SJU)

Cheap Flights from Buffalo to San Juan (BUF-SJU)

Prices were available within the past 7 days and start at $69 for one-way flights and $148 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Sun, Jan 25 - Mon, Feb 2
BUF
Buffalo
SJU
San Juan
$148 Roundtrip, found 20 hours ago
$148
Roundtrip
found 20 hours ago
Select Frontier Airlines flight, departing Sun, Jan 25 from Buffalo to San Juan, returning Mon, Feb 2, priced at $148 found 20 hours ago
Frontier Airlines
Fri, Jan 30 - Mon, Feb 2
BUF
Buffalo
SJU
San Juan
$155 Roundtrip, found 20 hours ago
$155
Roundtrip
found 20 hours ago
Select Frontier Airlines flight, departing Fri, Jan 30 from Buffalo to San Juan, returning Mon, Feb 2, priced at $155 found 20 hours ago
Frontier Airlines
Sat, Dec 6 - Sun, Dec 7
BUF
Buffalo
SJU
San Juan
$158 Roundtrip, found 16 hours ago
$158
Roundtrip
found 16 hours ago
Select Frontier Airlines flight, departing Sat, Dec 6 from Buffalo to San Juan, returning Sun, Dec 7, priced at $158 found 16 hours ago
Frontier Airlines
Sun, Nov 16 - Sun, Dec 7
BUF
Buffalo
SJU
San Juan
$163 Roundtrip, found 19 hours ago
$163
Roundtrip
found 19 hours ago
Select Frontier Airlines flight, departing Sun, Nov 16 from Buffalo to San Juan, returning Sun, Dec 7, priced at $163 found 19 hours ago
Frontier Airlines
Tue, Mar 3 - Mon, Mar 9
BUF
Buffalo
SJU
San Juan
$168 Roundtrip, found 5 hours ago
$168
Roundtrip
found 5 hours ago
Select Frontier Airlines flight, departing Tue, Mar 3 from Buffalo to San Juan, returning Mon, Mar 9, priced at $168 found 5 hours ago
Frontier Airlines
Fri, Jan 9 - Thu, Jan 15
BUF
Buffalo
SJU
San Juan
$187 Roundtrip, found 14 hours ago
$187
Roundtrip
found 14 hours ago
Select Frontier Airlines flight, departing Fri, Jan 9 from Buffalo to San Juan, returning Thu, Jan 15, priced at $187 found 14 hours ago
Delta
Tue, Mar 3 - Mon, Mar 9
BUF
Buffalo
SJU
San Juan
$197 Roundtrip, found 5 hours ago
$197
Roundtrip
found 5 hours ago
Select Delta flight, departing Tue, Mar 3 from Buffalo to San Juan, returning Mon, Mar 9, priced at $197 found 5 hours ago
Southwest Airlines
Sat, Feb 28 - Fri, Mar 6
BUF
Buffalo
SJU
San Juan
$212 Roundtrip, found 6 hours ago
$212
Roundtrip
found 6 hours ago
Select Southwest Airlines flight, departing Sat, Feb 28 from Buffalo to San Juan, returning Fri, Mar 6, priced at $212 found 6 hours ago
JetBlue Airways
Sat, Dec 6 - Wed, Jan 14
BUF
Buffalo
SJU
San Juan
$215 Roundtrip, found 23 hours ago
$215
Roundtrip
found 23 hours ago
Select JetBlue Airways flight, departing Sat, Dec 6 from Buffalo to San Juan, returning Wed, Jan 14, priced at $215 found 23 hours ago
United
Tue, Jan 27 - Wed, Jan 28
BUF
Buffalo
SJU
San Juan
$220 Roundtrip, found 20 hours ago
$220
Roundtrip
found 20 hours ago
Select United flight, departing Tue, Jan 27 from Buffalo to San Juan, returning Wed, Jan 28, priced at $220 found 20 hours ago

Find the cheapest month to fly from Buffalo (BUF) to San Juan (SJU)

February is typically the cheapest month to fly

From $140 - $501 per traveler.

Alternative airports near San Juan

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

Select flight to Luis Munoz Marin Intl. SJU. Cheapest option available. Average driving time to city center is 16 minutes. Flights from $267
SJU
Luis Munoz Marin Intl.
Cheapest
Average driving time to city center16 min
Flights from $267

Frequently asked questions

How much does a flight from Buffalo Niagara Intl. Airport (BUF) to Luis Munoz Marin Intl. Airport (SJU) cost?
Grab a cheap one-way flight from $69 or cheap return flight from $148 from Buffalo Niagara Intl. Airport (BUF) to Luis Munoz Marin Intl. Airport (SJU) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Buffalo Niagara Intl. Airport (BUF) to Luis Munoz Marin Intl. Airport (SJU)?
January is the least expensive month to fly from BUF to SJU. Traveling during quieter months is often the key to scoring lower fares.
What is the cheapest airline that flies from Buffalo Niagara Intl. Airport (BUF) to Luis Munoz Marin Intl. Airport (SJU)?
Use the filters on Expedia to compare different airlines and find the cheapest carrier that'll take you from BUF to SJU. Then, sort your results by "Price (lowest to highest)" to pick up a good deal.
How many flights per day from Buffalo Niagara Intl. Airport (BUF) to Luis Munoz Marin Intl. Airport (SJU)?
There are no daily direct flights from Buffalo Niagara Intl. Airport (BUF) to Luis Munoz Marin Intl. Airport (SJU). But you can opt for flights with layovers. Filter your search results on Expedia to include one or more stops, and you'll be on your way in no time.
What day of the week has the most flights from BUF to SJU?
Friday is generally the busiest day for flights, while Tuesday tends to be the quietest.* Just remember that flight schedules can vary based on a number of factors, such as the time of year and carrier.*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 Luis Munoz Marin Intl. Airport (SJU)?
Choose a flight from Buffalo Niagara Intl. Airport (BUF) to Luis Munoz Marin Intl. Airport (SJU) that leaves before 3 PM to reduce the likelihood of delays. Later departures have a 22% higher chance of being canceled, on average.**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.
Is it cheaper to buy a plane ticket from Buffalo Niagara Intl. Airport (BUF) to Luis Munoz Marin Intl. Airport (SJU) last-minute?
Holding off until just before your departure to book a ticket from BUF to SJU generally means paying more. While it's possible to find some last-minute discounts, there's no guarantee. Keep your travel plans flexible for a better chance of landing a bargain.
Can I cancel or change the date of my flight from Buffalo Niagara Intl. Airport (BUF) to Luis Munoz Marin Intl. Airport (SJU)?
Typically, you're able to reschedule or cancel your BUF to SJU flight. However, additional fees may apply, especially if you booked more than 24 hours ago. Double-check your itinerary for the airline's fees and rules on flight changes, or if you want more details, head to our Customer Service portal.

Travel information

Origin airport
Buffalo Niagara Intl.
Destination airport
Luis Munoz Marin Intl.
Airlines serving
American Airlines, Delta, Frontier Airlines, JetBlue Airways, Southwest Airlines, United
Roundtrip price
$138
Distance
1848 mi

Book with confidence

Buffalo to San Juan Flights

The cheapest times to fly from Buffalo to San Juan

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 San Juan are during the month of January. You can find some of the cheapest flights from Buffalo to San Juan with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Buffalo to San Juan

Sunday is one of the best days to book for cheap flights from Buffalo to San Juan: 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 San Juan

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 San Juan in 2025. You can also book with separate airlines for your outbound and return journeys, from $69 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 San Juan 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 San Juan 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 San Juan Flights

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*Available to One Key members.