Book Cheap Flights from Costa Rica with Alaska Airlines
Find round-trip flight deals from Costa Rica.*
Liberia, CR (LIR)to
Portland (PDX)
San Jose, CR (SJO)to
Seattle (SEA)*Displayed prices have been available within the past 24 hours and may not be available at the time of booking. Fares listed may be Saver fares, which is our most restrictive fare option and subject to additional restrictions. For roundtrip journeys, the price displayed—available within the past 24 hours—is the aggregate of the lowest available fare each way. Additional baggage charges and fees for optional products and services may apply. Other terms and conditions may apply.
Lowest one-way fares from Costa Rica.*
From | To | Fare Type | Dates | Price | |
|---|---|---|---|---|---|
| Liberia, CR (LIR) | Seattle (SEA) | One-way | Saver | Depart: Dec 22, 2026 | From $375 Seen: 5 hours ago | |
| Liberia, CR (LIR) | Seattle (SEA) | One-way | Saver | Depart: Jul 15, 2026 | From $375 Seen: 3 hours ago |
*Displayed prices have been available within the past 24 hours and may not be available at the time of booking. Fares listed may be Saver fares, which is our most restrictive fare option and subject to additional restrictions. For roundtrip journeys, the price displayed—available within the past 24 hours—is the aggregate of the lowest available fare each way. Additional baggage charges and fees for optional products and services may apply. Other terms and conditions may apply.