Book Cheap Flights to Costa Rica on Alaska Airlines
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1 Passenger
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Great Costa Rica one-way flight deals.*
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Los Angeles (LAX)to
Liberia, CR (LIR)Depart: Aug 11, 2026
From
$260
Seen: 3 hours ago
One-way
Saver
Los Angeles (LAX)to
Liberia, CR (LIR)Depart: Aug 16, 2026
From
$260
Seen: 9 hours ago
One-way
Saver
Los Angeles (LAX)to
Liberia, CR (LIR)Depart: Aug 15, 2026
From
$260
Seen: 2 hours ago
One-way
Saver
Los Angeles (LAX)to
Liberia, CR (LIR)Depart: Aug 17, 2026
From
$260
Seen: 1 hour ago
One-way
Saver
Los Angeles (LAX)to
Liberia, CR (LIR)Depart: Aug 1, 2026
From
$305
Seen: 4 hours ago
One-way
Saver
Los Angeles (LAX)to
San Jose, CR (SJO)Depart: Aug 4, 2026
From
$308
Seen: 17 hours ago
One-way
Saver
Los Angeles (LAX)to
San Jose, CR (SJO)Depart: Aug 5, 2026
From
$308
Seen: 17 hours ago
One-way
Saver
Los Angeles (LAX)to
San Jose, CR (SJO)Depart: Aug 8, 2026
From
$308
Seen: 17 hours ago
One-way
Saver
Los Angeles (LAX)to
San Jose, CR (SJO)Depart: Aug 6, 2026
From
$308
Seen: 17 hours ago
One-way
Saver
Los Angeles (LAX)to
San Jose, CR (SJO)Depart: Aug 10, 2026
From
$308
Seen: 17 hours ago
One-way
Saver
Portland (PDX)to
Liberia, CR (LIR)Depart: Aug 12, 2026
From
$217
Seen: 10 hours ago
One-way
Saver
Portland (PDX)to
Liberia, CR (LIR)Depart: Jul 30, 2026
From
$420
Seen: 3 hours ago
One-way
Saver
San Francisco (SFO)to
Liberia, CR (LIR)Depart: Aug 15, 2026
From
$304
Seen: 8 hours ago
One-way
Saver
Seattle (SEA)to
San Jose, CR (SJO)Depart: Aug 16, 2026
From
$268
Seen: 17 hours ago
One-way
Saver
Seattle (SEA)to
San Jose, CR (SJO)Depart: Aug 13, 2026
From
$268
Seen: 17 hours ago
One-way
Saver
Seattle (SEA)to
San Jose, CR (SJO)Depart: Aug 11, 2026
From
$279
Seen: 17 hours ago
One-way
Saver
Seattle (SEA)to
San Jose, CR (SJO)Depart: Aug 17, 2026
From
$279
Seen: 17 hours ago
One-way
Saver
Seattle (SEA)to
San Jose, CR (SJO)Depart: Aug 14, 2026
From
$279
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 | |
|---|---|---|---|---|---|
| Los Angeles (LAX) | Liberia, CR (LIR) | One-way | Saver | Depart: Nov 28, 2026 | From $213 Seen: 9 hours ago | |
| Los Angeles (LAX) | Liberia, CR (LIR) | One-way | Saver | Depart: Sep 11, 2026 | From $219 Seen: 3 hours ago | |
| Los Angeles (LAX) | Liberia, CR (LIR) | One-way | Saver | Depart: Oct 7, 2026 | From $219 Seen: 4 hours ago | |
| Los Angeles (LAX) | Liberia, CR (LIR) | One-way | Saver | Depart: Aug 28, 2026 | From $219 Seen: 3 hours ago | |
| Los Angeles (LAX) | Liberia, CR (LIR) | One-way | Saver | Depart: Sep 19, 2026 | From $219 Seen: 8 hours ago | |
| Los Angeles (LAX) | Liberia, CR (LIR) | One-way | Saver | Depart: Aug 21, 2026 | From $219 Seen: 5 hours ago | |
| Portland (PDX) | Liberia, CR (LIR) | One-way | Saver | Depart: Feb 6, 2027 | From $231 Seen: 7 hours ago | |
| Los Angeles (LAX) | San Jose, CR (SJO) | One-way | Saver | Depart: Nov 29, 2026 | From $253 Seen: 17 hours ago | |
| Los Angeles (LAX) | San Jose, CR (SJO) | One-way | Saver | Depart: Nov 28, 2026 | From $253 Seen: 17 hours ago | |
| San Diego (SAN) | Liberia, CR (LIR) | One-way | Saver | Depart: Aug 27, 2026 | From $256 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.