Book Cheap Flights to Costa Rica on Alaska Airlines
Great Costa Rica one-way flight deals.*
Los Angeles (LAX)to
Liberia, CR (LIR)Los Angeles (LAX)to
Liberia, CR (LIR)Los Angeles (LAX)to
Liberia, CR (LIR)Los Angeles (LAX)to
Liberia, CR (LIR)Los Angeles (LAX)to
Liberia, CR (LIR)Los Angeles (LAX)to
San Jose, CR (SJO)Los Angeles (LAX)to
San Jose, CR (SJO)Los Angeles (LAX)to
San Jose, CR (SJO)Los Angeles (LAX)to
San Jose, CR (SJO)Los Angeles (LAX)to
San Jose, CR (SJO)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
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 offers for plane tickets to Costa Rica.*
From | To | Fare Type | Dates | Price | |
|---|---|---|---|---|---|
| Los Angeles (LAX) | Liberia, CR (LIR) | One-way | Saver | Depart: May 5, 2026 | From $149 Seen: 13 hours ago | |
| Los Angeles (LAX) | Liberia, CR (LIR) | One-way | Saver | Depart: Apr 15, 2026 | From $149 Seen: 10 hours ago | |
| Los Angeles (LAX) | Liberia, CR (LIR) | One-way | Saver | Depart: Apr 19, 2026 | From $149 Seen: 9 hours ago | |
| Portland (PDX) | San Jose, CR (SJO) | One-way | Saver | Depart: Apr 28, 2026 | From $168 Seen: 8 hours ago | |
| Los Angeles (LAX) | Liberia, CR (LIR) | One-way | Saver | Depart: May 2, 2026 | From $169 Seen: 7 minutes ago | |
| San Francisco (SFO) | Liberia, CR (LIR) | One-way | Saver | Depart: May 2, 2026 | From $189 Seen: 11 hours ago | |
| San Francisco (SFO) | Liberia, CR (LIR) | One-way | Saver | Depart: Apr 20, 2026 | From $193 Seen: 5 hours ago | |
| Los Angeles (LAX) | San Jose, CR (SJO) | One-way | Saver | Depart: May 13, 2026 | From $199 Seen: 11 hours ago | |
| Los Angeles (LAX) | San Jose, CR (SJO) | One-way | Saver | Depart: Apr 20, 2026 | From $199 Seen: 8 hours ago | |
| Seattle (SEA) | Liberia, CR (LIR) | One-way | Saver | Depart: Apr 21, 2026 | From $202 Seen: 10 hours ago | |
| Portland (PDX) | Liberia, CR (LIR) | One-way | Saver | Depart: May 11, 2026 | From $202 Seen: 13 hours ago | |
| Los Angeles (LAX) | San Jose, CR (SJO) | One-way | Saver | Depart: Jun 9, 2026 | From $210 Seen: 4 hours ago | |
| Los Angeles (LAX) | San Jose, CR (SJO) | One-way | Saver | Depart: Apr 23, 2026 | From $210 Seen: 1 hour ago | |
| Los Angeles (LAX) | San Jose, CR (SJO) | One-way | Saver | Depart: May 16, 2026 | From $210 Seen: 23 minutes ago | |
| Los Angeles (LAX) | San Jose, CR (SJO) | One-way | Saver | Depart: May 30, 2026 | From $210 Seen: 12 hours ago | |
| Seattle (SEA) | Liberia, CR (LIR) | One-way | Saver | Depart: May 5, 2026 | From $212 Seen: 5 hours ago | |
| Seattle (SEA) | San Jose, CR (SJO) | One-way | Saver | Depart: Apr 28, 2026 | From $224 Seen: 5 hours ago | |
| Seattle (SEA) | San Jose, CR (SJO) | One-way | Saver | Depart: May 5, 2026 | From $224 Seen: 11 hours ago | |
| San Diego (SAN) | San Jose, CR (SJO) | One-way | Saver | Depart: May 19, 2026 | From $227 Seen: 2 hours ago | |
| Redmond (RDM) | Liberia, CR (LIR) | One-way | Saver | Depart: Apr 25, 2026 | From $232 Seen: 1 hour 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.