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

Return flights

02 Sep - 08 Sep	United
01 Sep - 08 Sep	United
03 Sep - 10 Sep	United
02 Sep - 09 Sep	United
02 Sep - 16 Sep	United
06 Sep - 13 Sep	United
04 Sep - 11 Sep	United
02 Sep - 30 Sep	Air Canada
01 Sep - 30 Sep	Air Canada
01 Sep - 01 Oct	Air Canada
22 Sep - 20 Oct	Air Canada
19 Sep - 28 Sep	Air Canada
01 Sep - 02 Oct	Air Canada

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 722€

Return flights