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

Return flights

03 Dec - 09 Dec	United
03 Dec - 10 Dec	United
03 Dec - 21 Jan	United
03 Dec - 17 Dec	United
10 Dec - 13 Jan	United
09 Dec - 16 Dec	United
01 Dec - 22 Dec	United
06 Dec - 26 Dec	United
04 Dec - 11 Dec	Air Canada
09 Dec - 26 Dec	United
09 Dec - 27 Jan	Air Canada
01 Dec - 08 Dec	United
12 Dec - 26 Dec	United
31 Dec - 25 Jan	Air France
31 Dec - 24 Jan	Air France
31 Dec - 31 Jan	Turkish Airlines
08 Dec - 12 Jan	United
23 Dec - 22 Jan	Air Canada
23 Dec - 19 Jan	Air Canada
23 Dec - 20 Jan	Air Canada

Also check the deals for one-way flights from Montreal 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 Montreal to Bangkok in December from 726€

Return flights