AirHint found the following cheapest return flights from Ontario (ONT) to Bangkok (BKK) in October 2025 (see full year).

Return flights

28 Oct - 18 Nov	Korean Air
28 Oct - 11 Nov	Korean Air
05 Oct - 13 Oct	Korean Air
05 Oct - 17 Oct	Korean Air
27 Oct - 27 Nov	Korean Air
29 Oct - 09 Nov	Korean Air
29 Oct - 12 Nov	Korean Air
27 Oct - 03 Nov	Korean Air
29 Oct - 10 Nov	Korean Air
23 Oct - 30 Oct	Korean Air
28 Oct - 24 Nov	Korean Air
20 Oct - 25 Nov	Korean Air
20 Oct - 26 Nov	Korean Air
23 Oct - 29 Oct	Korean Air
03 Oct - 05 Oct	STARLUX Airlines
04 Oct - 31 Oct	STARLUX Airlines
18 Oct - 24 Oct	STARLUX Airlines
20 Oct - 25 Oct	STARLUX Airlines
03 Oct - 12 Oct	STARLUX Airlines
03 Oct - 17 Oct	STARLUX Airlines

Also check the deals for one-way flights from Ontario to Bangkok in October.

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 Ontario to Bangkok in October from $702

Return flights