Alaska Airlines Flights from Costa Rica to United States
Deals on one-way flights from Costa Rica to United States.*
Liberia, CR (LIR)to
Seattle (SEA)Liberia, CR (LIR)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.
One-way low-fare flights Costa Rica to United States.*
From | To | Fare Type | Dates | Price | |
|---|---|---|---|---|---|
| Liberia, CR (LIR) | San Francisco (SFO) | One-way | Saver | Depart: Jul 5, 2026 | From $413 Seen: 5 hours ago | |
| Liberia, CR (LIR) | San Francisco (SFO) | One-way | Saver | Depart: Jun 30, 2026 | From $519 Seen: 12 hours ago | |
| Liberia, CR (LIR) | Portland (PDX) | One-way | Saver | Depart: Jun 30, 2026 | From $688 Seen: 4 hours ago | |
| San Jose, CR (SJO) | Seattle (SEA) | One-way | Saver | Depart: Jul 9, 2026 | From $1,155 Seen: 8 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.