AirHint found the following cheapest return flights from Buffalo (BUF) to Madrid (MAD) in December 2025 (see full year).
Return flights
| 07 Dec - 13 Dec | TAP | ||
| 29 Dec - 24 Jan | British Airways | ||
| 20 Dec - 28 Dec | Frontier Airlines |
Also check the deals for one-way flights from Buffalo to Madrid in December.
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