$113 Cheap Flights from Buffalo (BUF) to San Juan (SJU)

View $113 flight on Tue, Nov 11, 2025Opens in a new window

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

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

Prices were available within the past 7 days and start at $113 for one-way flights and $220 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Southwest Airlines
Fri, Oct 24 - Sat, Oct 25
BUF
Buffalo
SJU
San Juan
$220 Roundtrip, found 6 hours ago
$220
Roundtrip
found 6 hours ago
Select Southwest Airlines flight, departing Fri, Oct 24 from Buffalo to San Juan, returning Sat, Oct 25, priced at $220 found 6 hours ago
Delta
Tue, Oct 21 - Sat, Oct 25
BUF
Buffalo
SJU
San Juan
$225 Roundtrip, found 1 hour ago
$225
Roundtrip
found 1 hour ago
Select Delta flight, departing Tue, Oct 21 from Buffalo to San Juan, returning Sat, Oct 25, priced at $225 found 1 hour ago
United
Tue, Oct 28 - Fri, Oct 31
BUF
Buffalo
SJU
San Juan
$225 Roundtrip, found 7 hours ago
$225
Roundtrip
found 7 hours ago
Select United flight, departing Tue, Oct 28 from Buffalo to San Juan, returning Fri, Oct 31, priced at $225 found 7 hours ago
Delta
Tue, Oct 28 - Fri, Oct 31
BUF
Buffalo
SJU
San Juan
$228 Roundtrip, found 7 hours ago
$228
Roundtrip
found 7 hours ago
Select Delta flight, departing Tue, Oct 28 from Buffalo to San Juan, returning Fri, Oct 31, priced at $228 found 7 hours ago
Southwest Airlines
Wed, Nov 12 - Tue, Nov 18
BUF
Buffalo
SJU
San Juan
$229 Roundtrip, found 3 days ago
$229
Roundtrip
found 3 days ago
Select Southwest Airlines flight, departing Wed, Nov 12 from Buffalo to San Juan, returning Tue, Nov 18, priced at $229 found 3 days ago
American Airlines
Tue, Oct 28 - Wed, Oct 29
BUF
Buffalo
SJU
San Juan
$230 Roundtrip, found 2 days ago
$230
Roundtrip
found 2 days ago
Select American Airlines flight, departing Tue, Oct 28 from Buffalo to San Juan, returning Wed, Oct 29, priced at $230 found 2 days ago
American Airlines
Sun, Jan 11 - Fri, Jan 16
BUF
Buffalo
SJU
San Juan
$230 Roundtrip, found 2 hours ago
$230
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Sun, Jan 11 from Buffalo to San Juan, returning Fri, Jan 16, priced at $230 found 2 hours ago
American Airlines
Mon, Nov 10 - Wed, Nov 19
BUF
Buffalo
SJU
San Juan
$231 Roundtrip, found 4 hours ago
$231
Roundtrip
found 4 hours ago
Select American Airlines flight, departing Mon, Nov 10 from Buffalo to San Juan, returning Wed, Nov 19, priced at $231 found 4 hours ago
American Airlines
Tue, Oct 21 - Sat, Oct 25
BUF
Buffalo
SJU
San Juan
$232 Roundtrip, found 1 hour ago
$232
Roundtrip
found 1 hour ago
Select American Airlines flight, departing Tue, Oct 21 from Buffalo to San Juan, returning Sat, Oct 25, priced at $232 found 1 hour ago
Frontier Airlines
Thu, Oct 2 - Thu, Oct 9
BUF
Buffalo
SJU
San Juan
$253 Roundtrip, found 1 hour ago
$253
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Thu, Oct 2 from Buffalo to San Juan, returning Thu, Oct 9, priced at $253 found 1 hour ago

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

February is typically the cheapest month to fly

From $140 - $521 per traveler.

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 $113 or cheap return flight from $220 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)?
October 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

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
$219
Distance
1848 mi

Book with confidence

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 October. 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 $113 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.