AirHint found the following cheapest return flights from San Diego (SAN) to Buenos Aires (AEP) in December 2025 (see full year).
Return flights
| 03 Dec - 10 Dec | LATAM Airlines Group | ||
| 10 Dec - 30 Jan | Frontier Airlines | ||
| 11 Dec - 11 Jan | LATAM Airlines Group | ||
| 20 Dec - 05 Jan | Hawaiian Airlines | ||
| 19 Dec - 04 Jan | Hawaiian Airlines |
Also check the deals for one-way flights from San Diego to Buenos Aires in December.
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