AirHint found the following cheapest one-way flights from Toronto (YTZ) to Bangkok (BKK) in September 2025 (see full year).

One-Way flights

21 Sep	Porter Airlines (Canada) Ltd
29 Sep	Porter Airlines (Canada) Ltd
26 Sep	Porter Airlines (Canada) Ltd
20 Sep	Porter Airlines (Canada) Ltd
25 Sep	Porter Airlines (Canada) Ltd
24 Sep	Porter Airlines (Canada) Ltd
22 Sep	Air Canada
19 Sep	Porter Airlines (Canada) Ltd
23 Sep	Porter Airlines (Canada) Ltd
30 Sep	Porter Airlines (Canada) Ltd

Also check the deals for return flights from Toronto 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 one-way flights from Toronto to Bangkok in September from 562€

One-Way flights