Buffalo (BUF) to San Juan (SJU) cheap flight deal from $225 USD in economy class

UAUnited Airlines

Round Trip•Economy

BUF

Buffalo Niagara International Airport

Buffalo, United States

SJU

Luis Muñoz Marín International Airport

San Juan, Puerto Rico

$522 USD

-57%$225 USD

Verified Sep 21, 2025 at 3:36 PM

October 2025

Today

Mon

Tue

Wed

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Sun

29$631 30$268 1$268 2$346 3$288 4$330 5$304 6$336 7$274 8$269 9$371 10$444 11$396 12$356 13$367 14$265 15$398 16$342 17$342 18$309 19$314 20$250 21$225 22$264 23$342 24$342 25$265 26$225 27$303 28$225 29$225 30$342 31$342 1 2

Extremely Rare Availability

2% of dates checked are available within 10% of the lowest price

Monday, October 13th, 2025

10 round-trip options

Returning

Sat, Oct 18, 2025•5 Day Trip

$407 USD

Google Flights

Returning

Sun, Oct 19, 2025•6 Day Trip

$567 USD

Google Flights

Returning

Mon, Oct 20, 2025•7 Day Trip

$595 USD

Google Flights

Returning

Tue, Oct 21, 2025•8 Day Trip

$406 USD

Google Flights

Returning

Wed, Oct 22, 2025•9 Day Trip

$396 USD

Google Flights

Returning

Thu, Oct 23, 2025•10 Day Trip

$392 USD

Google Flights

Returning

Fri, Oct 24, 2025•11 Day Trip

$367 USD

Google Flights

Returning

Sat, Oct 25, 2025•12 Day Trip

$367 USD

Google Flights

Returning

Sun, Oct 26, 2025•13 Day Trip

$614 USD

Google Flights

Returning

Mon, Oct 27, 2025•14 Day Trip

$544 USD

Google Flights