Flights from Seattle to Costa Rica from $ 361*
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1 Passenger, Economy
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Find United's best fares from Seattle to Costa Rica
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Seattle (SEA)to
San Jose, CR (SJO)01/27/26 - 02/10/26from$Â 376Viewed: 6 hours agoRoundtripEconomy
Seattle (SEA)to
Liberia (Costa Rica) (LIR)01/27/26 - 02/03/26from$Â 361Viewed: 6 hours agoRoundtripEconomy
*Prices have been available for round trips within the last 48 hours and may not be currently available. For Economy class, fares listed may be Basic Economy, which is our most restrictive fare option and subject to additional restrictions. Additional baggage charges and fees for other optional service may apply. Other terms and conditions may apply. Schedules are subject to change without notice.
Business class flights from Seattle to Costa Rica
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Seattle (SEA)to
San Jose, CR (SJO)
03/24/26 - 04/02/26
Roundtrip
Business
from
$Â 1,138
Viewed: 1 day ago
Seattle (SEA)to
Liberia (Costa Rica) (LIR)
01/22/26 - 01/29/26
Roundtrip
Business
from
$Â 1,107
Viewed: 4 hours ago
*Prices have been available for round trips within the last 48 hours and may not be currently available. For Economy class, fares listed may be Basic Economy, which is our most restrictive fare option and subject to additional restrictions. Additional baggage charges and fees for other optional service may apply. Other terms and conditions may apply. Schedules are subject to change without notice.