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
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)Portland (PDX)to
Liberia, CR (LIR)Portland (PDX)to
Liberia, CR (LIR)Portland (PDX)to
San Jose, CR (SJO)San Francisco (SFO)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 11, 2026 | From $149 Seen: 5 hours ago | |
| Los Angeles (LAX) | Liberia, CR (LIR) | One-way | Saver | Depart: May 2, 2026 | From $169 Seen: 7 hours ago | |
| Los Angeles (LAX) | Liberia, CR (LIR) | One-way | Saver | Depart: May 15, 2026 | From $189 Seen: 12 hours ago | |
| San Francisco (SFO) | Liberia, CR (LIR) | One-way | Saver | Depart: May 2, 2026 | From $189 Seen: 8 hours ago | |
| Los Angeles (LAX) | San Jose, CR (SJO) | One-way | Saver | Depart: Apr 20, 2026 | From $199 Seen: 1 hour ago | |
| Los Angeles (LAX) | San Jose, CR (SJO) | One-way | Saver | Depart: Apr 21, 2026 | From $199 Seen: 1 hour ago | |
| Los Angeles (LAX) | San Jose, CR (SJO) | One-way | Saver | Depart: Apr 26, 2026 | From $199 Seen: 1 hour ago | |
| Los Angeles (LAX) | San Jose, CR (SJO) | One-way | Saver | Depart: May 10, 2026 | From $199 Seen: 1 hour ago | |
| Los Angeles (LAX) | San Jose, CR (SJO) | One-way | Saver | Depart: Apr 19, 2026 | From $199 Seen: 1 hour ago | |
| Los Angeles (LAX) | San Jose, CR (SJO) | One-way | Saver | Depart: Apr 27, 2026 | From $199 Seen: 1 hour ago | |
| Portland (PDX) | Liberia, CR (LIR) | One-way | Saver | Depart: Aug 16, 2026 | From $202 Seen: 17 hours ago | |
| Portland (PDX) | Liberia, CR (LIR) | One-way | Saver | Depart: May 11, 2026 | From $202 Seen: 11 hours ago | |
| Seattle (SEA) | Liberia, CR (LIR) | One-way | Saver | Depart: Apr 21, 2026 | From $212 Seen: 15 hours ago | |
| Seattle (SEA) | Liberia, CR (LIR) | One-way | Saver | Depart: May 5, 2026 | From $221 Seen: 11 hours ago | |
| Seattle (SEA) | San Jose, CR (SJO) | One-way | Saver | Depart: Apr 28, 2026 | From $224 Seen: 55 minutes ago | |
| Seattle (SEA) | San Jose, CR (SJO) | One-way | Saver | Depart: Apr 29, 2026 | From $224 Seen: 55 minutes ago | |
| Seattle (SEA) | San Jose, CR (SJO) | One-way | Saver | Depart: May 5, 2026 | From $224 Seen: 55 minutes ago | |
| Seattle (SEA) | San Jose, CR (SJO) | One-way | Saver | Depart: May 9, 2026 | From $228 Seen: 55 minutes ago | |
| Seattle (SEA) | San Jose, CR (SJO) | One-way | Saver | Depart: Apr 20, 2026 | From $233 Seen: 55 minutes ago | |
| Seattle (SEA) | San Jose, CR (SJO) | One-way | Saver | Depart: May 1, 2026 | From $233 Seen: 55 minutes 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.