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

Return flights

05 Dec - 07 Dec	AirAsia
04 Dec - 07 Dec	AirAsia
19 Dec - 30 Dec	AirAsia
06 Dec - 09 Dec	Thai VietJet Air
16 Dec - 18 Dec	AirAsia
10 Dec - 12 Dec	AirAsia
25 Dec - 01 Jan	Thai VietJet Air
02 Dec - 06 Dec	Thai VietJet Air
29 Dec - 05 Jan	Malaysia Airlines
26 Dec - 02 Jan	Thai AirAsia
10 Dec - 19 Dec	AirAsia
13 Dec - 15 Dec	AirAsia
14 Dec - 16 Dec	Thai AirAsia
30 Dec - 06 Jan	Thai VietJet Air
29 Dec - 05 Jan	Scoot	direct
25 Dec - 01 Jan	Scoot	direct
30 Dec - 04 Jan	Scoot	direct
30 Dec - 06 Jan	Scoot	direct

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 242€

Return flights