AirHint found the following cheapest return flights from Oakland (OAK) to Chiang Mai (CNX) in December 2025 (see full year).
Return flights
| 29 Dec - 30 Jan | Korean Air | ||
| 14 Dec - 22 Dec | EVA Air | ||
| 27 Dec - 18 Jan | China Airlines | ||
| 26 Dec - 20 Jan | Korean Air | ||
| 18 Dec - 29 Dec | EVA Air | ||
| 22 Dec - 31 Dec | EVA Air | ||
| 21 Dec - 11 Jan | Korean Air |
Also check the deals for one-way flights from Oakland to Chiang Mai in December.
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