BOS to SJO from $376 in economy

UAUnited Airlines

Round Trip•Economy

BOS

Logan International Airport

Boston, United States

SJO

Juan Santamaría International Airport (SJO)

San José, Costa Rica

$628 USD

-40%$376 USD

Verified 14 days ago

September 2026

Today

Mon

Tue

Wed

Thu

Fri

Sat

Sun

31$406 1$406 2$381 3$413 4$405 5$381 6$381 7$454 8$381 9$381 10$381 11$381 12$381 13$424 14$381 15$376 16$376 17$386 18$490 19$429 20$504 21$412 22$376 23$417 24$376 25$376 26$376 27$478 28$376 29$376 30$417 1$386 2$376 3$400 4$376

Fair Availability

20% of dates checked are available within 10% of the lowest price

Friday, September 25th, 2026

7 round-trip options

Returning

Wed, Sep 30, 2026•5 Day Trip

$478 USD

Google Flights

Returning

Thu, Oct 1, 2026•6 Day Trip

$382 USD

Google Flights

Returning

Sat, Oct 3, 2026•8 Day Trip

$376 USD

Google Flights

Returning

Mon, Oct 5, 2026•10 Day Trip

$376 USD

Google Flights

Returning

Tue, Oct 6, 2026•11 Day Trip

$376 USD

Google Flights

Returning

Wed, Oct 7, 2026•12 Day Trip

$376 USD

Google Flights

Returning

Thu, Oct 8, 2026•13 Day Trip

$642 USD

Google Flights

Boston (BOS) to San José (SJO) flight deal in economy from $376

Logan International Airport

Juan Santamaría International Airport (SJO)

September 2026

Friday, September 25th, 2026