AirHint found the following cheapest return flights from Calgary (YYC) to Bangkok (BKK) in September 2025 (see full year).

Return flights

01 Sep - 29 Sep	WestJet
09 Sep - 16 Sep	WestJet
23 Sep - 30 Sep	WestJet
09 Sep - 23 Sep	WestJet
09 Sep - 12 Oct	WestJet
23 Sep - 14 Oct	WestJet
17 Sep - 01 Oct	WestJet
16 Sep - 30 Sep	Cathay Pacific
21 Sep - 12 Oct	WestJet
16 Sep - 25 Sep	Cathay Pacific
21 Sep - 27 Sep	WestJet
19 Sep - 25 Sep	WestJet
21 Sep - 04 Oct	WestJet
02 Sep - 16 Sep	WestJet
10 Sep - 30 Sep	WestJet
25 Sep - 01 Oct	WestJet
09 Sep - 08 Oct	WestJet
17 Sep - 08 Oct	WestJet
23 Sep - 08 Oct	WestJet
26 Sep - 17 Oct	WestJet

Also check the deals for one-way flights from Calgary 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 Calgary to Bangkok in September from $707

Return flights