Southwest® flights from Ontario/LA to Costa Rica
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Popular flight deals and low fares from Ontario/LA
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Ontario/LA (ONT)to
San Jose, Costa Rica (SJO)Depart: 01/01/2026
From
$295
Seen: 3 hrs ago
One-way
Basic
Ontario/LA (ONT)to
Liberia, Costa Rica (LIR)Depart: 12/11/2025
From
$387
Seen: 1 hour ago
One-way
Choice
*Fares displayed have been collected within the last 24 hours and may no longer be available at time of booking. Additional fees and charges for optional products and services may apply. Modifying this information may result in a different fare. To find the most updated fare, please visit Southwest.com. Fares listed are Basic, which are subject to additional terms and conditions.
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From | To | Fare Type | Dates | Price |
|---|---|---|---|---|
| Ontario/LA (ONT) | San Jose, Costa Rica (SJO) | One-way / Basic | Depart: 02/24/2026 | From $195 Seen: 1 hour ago |
| Ontario/LA (ONT) | Liberia, Costa Rica (LIR) | One-way / Basic | Depart: 02/23/2026 | From $197 Seen: 47 minutes ago |
*Fares displayed have been collected within the last 24 hours and may no longer be available at time of booking. Additional fees and charges for optional products and services may apply. Modifying this information may result in a different fare. To find the most updated fare, please visit Southwest.com. Fares listed are Basic, which are subject to additional terms and conditions.
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