AirHint found the following cheapest return flights from Calgary (YYC) to Bangkok (BKK) in December 2025 (see full year).

Return flights

28 Dec - 28 Jan	WestJet
02 Dec - 10 Dec	Air Canada
07 Dec - 21 Dec	Air Canada
24 Dec - 01 Jan	Flair Airlines
14 Dec - 21 Dec	Cathay Pacific
12 Dec - 10 Jan	Air Canada
19 Dec - 03 Jan	Flair Airlines
13 Dec - 10 Jan	Air Canada
17 Dec - 07 Jan	Air Canada
17 Dec - 01 Jan	Air Canada
12 Dec - 23 Dec	KLM
25 Dec - 11 Jan	Air Canada
19 Dec - 22 Dec	Air Canada
20 Dec - 11 Jan	Air Canada
19 Dec - 30 Dec	KLM
17 Dec - 04 Jan	Air Canada

Also check the deals for one-way flights from Calgary to Bangkok 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 Calgary to Bangkok in December from 1006€

Return flights