AirHint found the following cheapest return flights from Chiang Mai (CNX) to Singapore (SIN) in December 2025 (see full year).

Return flights

02 Dec - 12 Dec	Malaysia Airlines
05 Dec - 23 Dec	AirAsia
18 Dec - 07 Jan	Thai AirAsia
18 Dec - 06 Jan	Thai AirAsia
17 Dec - 07 Jan	Thai AirAsia
17 Dec - 06 Jan	Thai AirAsia
16 Dec - 06 Jan	Thai AirAsia
18 Dec - 05 Jan	Thai AirAsia
16 Dec - 05 Jan	Thai AirAsia
23 Dec - 06 Jan	Thai AirAsia
22 Dec - 06 Jan	Thai AirAsia
17 Dec - 05 Jan	Thai AirAsia
12 Dec - 15 Dec	Thai AirAsia
12 Dec - 28 Dec	Thai AirAsia
12 Dec - 27 Dec	Thai AirAsia
10 Dec - 11 Dec	Thai AirAsia
10 Dec - 15 Dec	Thai AirAsia
10 Dec - 28 Dec	Thai AirAsia
10 Dec - 27 Dec	Thai AirAsia
12 Dec - 30 Dec	Thai AirAsia

Also check the deals for one-way flights from Chiang Mai to Singapore in December.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Chiang Mai to Singapore in December from 198€

Return flights