AirHint found the following cheapest return flights from Montreal (YUL) to Bangkok (BKK) in September 2026 (see full year).

Return flights

07 Sep - 24 Sep	United
07 Sep - 28 Sep	United
07 Sep - 30 Sep	United
21 Sep - 28 Sep	United
02 Sep - 24 Sep	United
02 Sep - 28 Sep	United
02 Sep - 30 Sep	United
02 Sep - 09 Sep	United
02 Sep - 06 Oct	United
01 Sep - 30 Sep	United
01 Sep - 08 Sep	United
08 Sep - 07 Oct	United
23 Sep - 07 Oct	United
28 Sep - 05 Oct	United
28 Sep - 21 Oct	United
28 Sep - 12 Oct	United
01 Sep - 03 Oct	United
08 Sep - 03 Oct	United
07 Sep - 04 Oct	United
29 Sep - 06 Oct	United

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

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 September from 718€

Return flights