AirHint found the following cheapest return flights from Chiang Mai (CNX) to Colombo (CMB) in December 2025 (see full year).
Return flights
| 23 Dec - 11 Jan | Nok Air | ||
| 21 Dec - 11 Jan | Nok Air | ||
| 30 Dec - 30 Jan | Nok Air | ||
| 01 Dec - 06 Dec | Thai VietJet Air | ||
| 19 Dec - 26 Dec | Thai Lion Air | ||
| 16 Dec - 19 Dec | Thai AirAsia | ||
| 01 Dec - 15 Dec | Thai AirAsia |
Also check the deals for one-way flights from Chiang Mai to Colombo in December.
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