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

Return flights

02 Dec - 09 Dec	Air Canada
03 Dec - 10 Dec	Air Canada
04 Dec - 11 Dec	Air Canada
04 Dec - 25 Dec	Air Canada
06 Dec - 24 Dec	Air Canada
03 Dec - 21 Jan	Air Canada
05 Dec - 12 Dec	Air Canada
04 Dec - 29 Dec	Air Canada
07 Dec - 14 Dec	Etihad Airways
03 Dec - 28 Dec	Air Canada
03 Dec - 27 Dec	Air Canada
02 Dec - 21 Jan	United
31 Dec - 31 Jan	Air Canada
09 Dec - 14 Jan	Air France
10 Dec - 08 Jan	Air Canada
28 Dec - 18 Jan	Air Canada
23 Dec - 22 Jan	Air Canada
03 Dec - 01 Jan	Air Canada
24 Dec - 21 Jan	Air Canada
10 Dec - 06 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 764€

Return flights