AirHint found the following cheapest return flights from Chiang Mai (CNX) to Madrid (MAD) in December 2025 (see full year).
Return flights
| 11 Dec - 15 Dec | Thai AirAsia | ||
| 26 Dec - 08 Jan | Air China | ||
| 18 Dec - 20 Dec | Etihad Airways |
Also check the deals for one-way flights from Chiang Mai to Madrid in December.
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