AirHint found the following cheapest return flights from Santander (SDR) to Buenos Aires (EZE) in December 2025 (see full year).
Return flights
| 31 Dec - 21 Jan | Iberia | ||
| 31 Dec - 17 Jan | Iberia | ||
| 31 Dec - 19 Jan | Iberia | ||
| 15 Dec - 15 Jan | Iberia |
Also check the deals for one-way flights from Santander to Buenos Aires in December.
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