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

Return flights

03 Sep - 17 Sep	Porter Airlines (Canada) Ltd
02 Sep - 28 Oct	Porter Airlines (Canada) Ltd
07 Sep - 18 Sep	WestJet
04 Sep - 18 Sep	WestJet
11 Sep - 17 Sep	WestJet
02 Sep - 09 Sep	WestJet
18 Sep - 30 Sep	WestJet
01 Sep - 24 Sep	WestJet
02 Sep - 07 Sep	WestJet
13 Sep - 22 Sep	WestJet
10 Sep - 26 Sep	WestJet
23 Sep - 18 Oct	WestJet
26 Sep - 20 Oct	WestJet
04 Sep - 09 Oct	WestJet
18 Sep - 02 Oct	WestJet
25 Sep - 21 Oct	WestJet
01 Sep - 01 Oct	WestJet

Also check the deals for one-way flights from Hamilton 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 Hamilton to Bangkok in September from $849

Return flights