Boise (BOI) to San José (SJO) flight deal from $298 USD in economy class

UAUnited Airlines

Round Trip•Economy

BOI

Boise Air Terminal (Gowen Field)

Boise, United States

SJO

Juan Santamaría International Airport (SJO)

San José, Costa Rica

$558 USD

-47%$298 USD

Verified Nov 25, 2025 at 10:14 PM

December 2025

Today

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1$328 2$401 3$316 4$320 5$298 6$298 7$298 8$298 9$298 10$366 11$333 12$298 13$455 14$463 15$474 16$537 17$495 18$658 19$745 20$807 21$944 22$819 23$944 24$801 25$1,126 26$1,245 27$1,136 28$873 29$740 30$602 31$418 1 2 3 4

Limited Availability

16% of dates checked are available within 10% of the lowest price

Tuesday, December 2nd, 2025

10 round-trip options

Returning

Sun, Dec 7, 2025•5 Day Trip

$517 USD

Google Flights

Returning

Mon, Dec 8, 2025•6 Day Trip

$403 USD

Google Flights

Returning

Tue, Dec 9, 2025•7 Day Trip

$401 USD

Google Flights

Returning

Wed, Dec 10, 2025•8 Day Trip

$405 USD

Google Flights

Returning

Thu, Dec 11, 2025•9 Day Trip

$405 USD

Google Flights

Returning

Fri, Dec 12, 2025•10 Day Trip

$422 USD

Google Flights

Returning

Sat, Dec 13, 2025•11 Day Trip

$516 USD

Google Flights

Returning

Sun, Dec 14, 2025•12 Day Trip

$476 USD

Google Flights

Returning

Mon, Dec 15, 2025•13 Day Trip

$421 USD

Google Flights

Returning

Tue, Dec 16, 2025•14 Day Trip

$415 USD

Google Flights