Boston (BOS) to San José (SJO) flight deal from $310 USD in economy class

UAUnited Airlines

Round Trip•Economy

BOS

Logan International Airport

Boston, United States

SJO

Juan Santamaría International Airport (SJO)

San José, Costa Rica

$634 USD

-51%$310 USD

Verified Mar 21, 2026 at 6:20 PM

April 2026

Today

Mon

Tue

Wed

Thu

Fri

Sat

Sun

30$328 31$570 1$644 2$800 3$641 4$634 5$634 6$525 7$323 8$323 9$323 10$324 11$324 12$324 13$324 14$324 15$327 16$389 17$463 18$398 19$453 20$414 21$420 22$367 23$367 24$367 25$320 26$320 27$320 28$320 29$320 30$520 1 2 3

Extremely Rare Availability

4% of dates checked are available within 10% of the lowest price

Wednesday, April 15th, 2026

10 round-trip options

Returning

Mon, Apr 20, 2026•5 Day Trip

$454 USD

Google Flights

Returning

Tue, Apr 21, 2026•6 Day Trip

$327 USD

Google Flights

Returning

Wed, Apr 22, 2026•7 Day Trip

$338 USD

Google Flights

Returning

Thu, Apr 23, 2026•8 Day Trip

$362 USD

Google Flights

Returning

Fri, Apr 24, 2026•9 Day Trip

$775 USD

Google Flights

Returning

Sat, Apr 25, 2026•10 Day Trip

$690 USD

Google Flights

Returning

Sun, Apr 26, 2026•11 Day Trip

$531 USD

Google Flights

Returning

Mon, Apr 27, 2026•12 Day Trip

$528 USD

Google Flights

Returning

Tue, Apr 28, 2026•13 Day Trip

$469 USD

Google Flights

Returning

Wed, Apr 29, 2026•14 Day Trip

$473 USD

Google Flights