Book Cheap Flights to Costa Rica on Alaska Airlines
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1 Passenger
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Find Costa Rica flight deals.*
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Seattle (SEA)to
San Jose, CR (SJO)Depart: Nov 27, 2026
From
$314
Seen: 17 hours ago
One-way
Saver
Seattle (SEA)to
San Jose, CR (SJO)Depart: Nov 26, 2026
From
$329
Seen: 17 hours ago
One-way
Saver
Seattle (SEA)to
San Jose, CR (SJO)Depart: Nov 14, 2026
From
$375
Seen: 17 hours ago
One-way
Saver
Seattle (SEA)to
San Jose, CR (SJO)Depart: Nov 28, 2026
From
$375
Seen: 17 hours ago
One-way
Saver
Seattle (SEA)to
San Jose, CR (SJO)Depart: Nov 13, 2026
From
$380
Seen: 17 hours ago
One-way
Saver
Seattle (SEA)to
Liberia, CR (LIR)Depart: Nov 28, 2026
From
$418
Seen: 17 hours ago
One-way
Saver
Seattle (SEA)to
Liberia, CR (LIR)Depart: Nov 27, 2026
From
$418
Seen: 17 hours ago
One-way
Saver
Seattle (SEA)to
Liberia, CR (LIR)Depart: Dec 7, 2026
From
$448
Seen: 17 hours ago
One-way
Saver
Seattle (SEA)to
Liberia, CR (LIR)Depart: Dec 6, 2026
From
$466
Seen: 17 hours ago
One-way
Saver
Seattle (SEA)to
Liberia, CR (LIR)Depart: Nov 30, 2026
From
$486
Seen: 17 hours ago
One-way
Saver
*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.*
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From | To | Fare Type | Dates | Price | |
|---|---|---|---|---|---|
| Seattle (SEA) | San Jose, CR (SJO) | One-way | Saver | Depart: Feb 21, 2027 | From $294 Seen: 17 hours ago | |
| Seattle (SEA) | San Jose, CR (SJO) | One-way | Saver | Depart: Dec 31, 2026 | From $294 Seen: 17 hours ago | |
| Seattle (SEA) | San Jose, CR (SJO) | One-way | Saver | Depart: Feb 20, 2027 | From $299 Seen: 17 hours ago | |
| Seattle (SEA) | San Jose, CR (SJO) | One-way | Saver | Depart: Dec 30, 2026 | From $299 Seen: 17 hours ago | |
| Seattle (SEA) | San Jose, CR (SJO) | One-way | Saver | Depart: Apr 27, 2027 | From $314 Seen: 17 hours ago | |
| Seattle (SEA) | San Jose, CR (SJO) | One-way | Saver | Depart: May 9, 2027 | From $314 Seen: 17 hours ago | |
| Seattle (SEA) | Liberia, CR (LIR) | One-way | Saver | Depart: Feb 20, 2027 | From $329 Seen: 17 hours ago | |
| Seattle (SEA) | Liberia, CR (LIR) | One-way | Saver | Depart: Feb 27, 2027 | From $329 Seen: 17 hours ago | |
| Seattle (SEA) | Liberia, CR (LIR) | One-way | Saver | Depart: Mar 2, 2027 | From $329 Seen: 17 hours ago | |
| Seattle (SEA) | Liberia, CR (LIR) | One-way | Saver | Depart: Jan 30, 2027 | From $329 Seen: 17 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.