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

Return flights

11 Dec - 11 Jan	AirAsia
28 Dec - 03 Jan	Scoot
26 Dec - 31 Dec	Scoot	direct
12 Dec - 14 Dec	AirAsia
27 Dec - 04 Jan	Scoot
29 Dec - 07 Jan	Scoot
09 Dec - 14 Dec	Thai VietJet Air
09 Dec - 11 Dec	Scoot
09 Dec - 13 Dec	Thai VietJet Air
25 Dec - 29 Dec	Thai AirAsia
11 Dec - 11 Jan	Scoot	direct
28 Dec - 29 Dec	Scoot
27 Dec - 28 Dec	Scoot	direct
27 Dec - 04 Jan	Scoot	direct
28 Dec - 29 Dec	Scoot	direct
28 Dec - 03 Jan	Scoot	direct
26 Dec - 28 Dec	Scoot
31 Dec - 03 Jan	Thai AirAsia
29 Dec - 07 Jan	Scoot	direct
30 Dec - 02 Jan	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 $232

Return flights