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

Return flights

27 Oct - 03 Nov	Air Canada
27 Oct - 10 Nov	Air Canada
29 Oct - 05 Nov	Air Canada
26 Oct - 02 Nov	WestJet
26 Oct - 17 Nov	WestJet
30 Oct - 06 Nov	Porter Airlines (Canada) Ltd
28 Oct - 27 Nov	WestJet
30 Oct - 24 Nov	Porter Airlines (Canada) Ltd
16 Oct - 20 Oct	WestJet
23 Oct - 30 Oct	WestJet
31 Oct - 17 Nov	Air Canada
30 Oct - 02 Nov	Porter Airlines (Canada) Ltd
21 Oct - 28 Oct	WestJet
14 Oct - 21 Oct	WestJet
17 Oct - 25 Oct	WestJet
16 Oct - 23 Oct	WestJet
01 Oct - 08 Oct	Air Canada
14 Oct - 28 Oct	WestJet
17 Oct - 24 Oct	WestJet
07 Oct - 28 Oct	WestJet

Also check the deals for one-way flights from Montreal to Bangkok in October.

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 October from $816

Return flights