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)San Francisco (SFO)to
Liberia, CR (LIR)Portland (PDX)to
Liberia, CR (LIR)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: Feb 2, 2026 | From $159 Seen: 8 hours ago | |
| Los Angeles (LAX) | Liberia, CR (LIR) | One-way | Saver | Depart: May 3, 2026 | From $159 Seen: 15 hours ago | |
| Los Angeles (LAX) | Liberia, CR (LIR) | One-way | Saver | Depart: Mar 2, 2026 | From $159 Seen: 2 hours ago | |
| Los Angeles (LAX) | San Jose, CR (SJO) | One-way | Saver | Depart: Apr 12, 2026 | From $164 Seen: 6 hours ago | |
| Los Angeles (LAX) | San Jose, CR (SJO) | One-way | Saver | Depart: Apr 13, 2026 | From $164 Seen: 6 hours ago | |
| Los Angeles (LAX) | San Jose, CR (SJO) | One-way | Saver | Depart: Apr 20, 2026 | From $164 Seen: 6 hours ago | |
| Los Angeles (LAX) | San Jose, CR (SJO) | One-way | Saver | Depart: Apr 21, 2026 | From $164 Seen: 6 hours ago | |
| Los Angeles (LAX) | San Jose, CR (SJO) | One-way | Saver | Depart: Apr 22, 2026 | From $164 Seen: 6 hours ago | |
| Los Angeles (LAX) | San Jose, CR (SJO) | One-way | Saver | Depart: Apr 26, 2026 | From $164 Seen: 6 hours ago | |
| Seattle (SEA) | Liberia, CR (LIR) | One-way | Saver | Depart: Feb 2, 2026 | From $168 Seen: 1 hour ago | |
| Portland (PDX) | Liberia, CR (LIR) | One-way | Saver | Depart: Mar 24, 2026 | From $171 Seen: 17 hours ago | |
| Seattle (SEA) | San Jose, CR (SJO) | One-way | Saver | Depart: Mar 11, 2026 | From $179 Seen: 6 hours ago | |
| Seattle (SEA) | San Jose, CR (SJO) | One-way | Saver | Depart: Mar 10, 2026 | From $179 Seen: 6 hours ago | |
| Seattle (SEA) | Liberia, CR (LIR) | One-way | Saver | Depart: Apr 6, 2026 | From $182 Seen: 10 hours ago | |
| Seattle (SEA) | San Jose, CR (SJO) | One-way | Saver | Depart: Mar 9, 2026 | From $188 Seen: 6 hours ago | |
| Seattle (SEA) | San Jose, CR (SJO) | One-way | Saver | Depart: Mar 8, 2026 | From $188 Seen: 6 hours ago | |
| Los Angeles (LAX) | Liberia, CR (LIR) | One-way | Saver | Depart: Apr 16, 2026 | From $189 Seen: 16 hours ago | |
| Los Angeles (LAX) | Liberia, CR (LIR) | One-way | Saver | Depart: Jan 30, 2026 | From $189 Seen: 15 hours ago | |
| Los Angeles (LAX) | Liberia, CR (LIR) | One-way | Saver | Depart: Mar 25, 2026 | From $189 Seen: 13 hours ago | |
| Seattle (SEA) | San Jose, CR (SJO) | One-way | Saver | Depart: May 5, 2026 | From $209 Seen: 6 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.