SEA to LIR from $439 in economy – flightdeals.net

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American Airlines

AAAmerican Airlines

Round Trip•Economy

Seattle–Tacoma International Airport

Seattle / Tacoma, United States

Daniel Oduber Quirós International Airport

Liberia, Costa Rica

$818 USD

-46%$439 USD

Verified about 11 hours ago

September 2026

Mon

Tue

Wed

Thu

Fri

Sat

Sun

31$565 1$649 2$626 3$585 4$585 5$560 6$535 7$656 8$619 9$565 10$560 11$560 12$439 13$439 14$560 15$546 16$565 17$560 18$560 19$439 20$487 21$560 22$523 23$565 24$560 25$560 26$482 27$487 28$560 29$487 30$613 1$603 2$603 3$530 4$535

Extremely Rare Availability

1% of dates checked are available within 10% of the lowest price

Sunday, September 13th, 2026

3 round-trip options

Returning

Fri, Sep 18, 2026•5 Day Trip

$551 USD

Returning

Sun, Sep 20, 2026•7 Day Trip

$565 USD

Returning

Fri, Sep 25, 2026•12 Day Trip

$439 USD