Alaska Airlines Cheap Flights from Seattle to Costa Rica
Deals on one-way flights from Seattle to Costa Rica.*
Seattle (SEA)to
Liberia, CR (LIR)Seattle (SEA)to
Liberia, CR (LIR)Seattle (SEA)to
Liberia, CR (LIR)Seattle (SEA)to
Liberia, CR (LIR)Seattle (SEA)to
San Jose, CR (SJO)Seattle (SEA)to
San Jose, CR (SJO)Seattle (SEA)to
San Jose, CR (SJO)Seattle (SEA)to
San Jose, CR (SJO)Seattle (SEA)to
San Jose, CR (SJO)*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 Seattle to Costa Rica.*
From | To | Fare Type | Dates | Price | |
|---|---|---|---|---|---|
| Seattle (SEA) | Liberia, CR (LIR) | One-way | Saver | Depart: Jan 28, 2026 | From $168 Seen: 2 hours ago | |
| Seattle (SEA) | San Jose, CR (SJO) | One-way | Saver | Depart: Mar 31, 2026 | From $190 Seen: 12 hours ago | |
| Seattle (SEA) | Liberia, CR (LIR) | One-way | Saver | Depart: Jan 29, 2026 | From $198 Seen: 1 day ago | |
| Seattle (SEA) | Liberia, CR (LIR) | One-way | Saver | Depart: Jan 31, 2026 | From $198 Seen: 7 hours ago | |
| Seattle (SEA) | San Jose, CR (SJO) | One-way | Saver | Depart: Mar 30, 2026 | From $203 Seen: 12 hours ago | |
| Seattle (SEA) | San Jose, CR (SJO) | One-way | Saver | Depart: Feb 24, 2026 | From $220 Seen: 12 hours ago | |
| Seattle (SEA) | San Jose, CR (SJO) | One-way | Saver | Depart: Feb 23, 2026 | From $226 Seen: 12 hours ago | |
| Seattle (SEA) | San Jose, CR (SJO) | One-way | Saver | Depart: Mar 24, 2026 | From $229 Seen: 12 hours ago | |
| Seattle (SEA) | San Jose, CR (SJO) | One-way | Saver | Depart: Apr 20, 2026 | From $229 Seen: 12 hours ago | |
| Seattle (SEA) | Liberia, CR (LIR) | One-way | Saver | Depart: Aug 1, 2026 | From $236 Seen: 17 hours ago | |
| Seattle (SEA) | Liberia, CR (LIR) | One-way | Saver | Depart: Jun 27, 2026 | From $236 Seen: 7 hours ago | |
| Seattle (SEA) | Liberia, CR (LIR) | One-way | Saver | Depart: Apr 4, 2026 | From $497 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.