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

Sunday, December 21st, 2025

10 round-trip options

Returning

Fri, Dec 26, 2025•5 Day Trip

$988 USD

Google Flights

Returning

Sat, Dec 27, 2025•6 Day Trip

$989 USD

Google Flights

Returning

Sun, Dec 28, 2025•7 Day Trip

$989 USD

Google Flights

Returning

Mon, Dec 29, 2025•8 Day Trip

$944 USD

Google Flights

Returning

Tue, Dec 30, 2025•9 Day Trip

$998 USD

Google Flights

Returning

Wed, Dec 31, 2025•10 Day Trip

$1,202 USD

Google Flights

Returning

Thu, Jan 1, 2026•11 Day Trip

$1,112 USD

Google Flights

Returning

Fri, Jan 2, 2026•12 Day Trip

$1,421 USD

Google Flights

Returning

Sat, Jan 3, 2026•13 Day Trip

$1,590 USD

Google Flights

Returning

Sun, Jan 4, 2026•14 Day Trip

$1,555 USD

Google Flights