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

Return flights

19 Aug - 30 Aug	Korean Air
28 Aug - 07 Sep	Korean Air
25 Aug - 08 Sep	Korean Air
28 Aug - 10 Sep	Korean Air
26 Aug - 07 Sep	Korean Air
19 Aug - 07 Sep	Korean Air
24 Aug - 21 Sep	Korean Air
24 Aug - 07 Sep	Korean Air
09 Aug - 23 Aug	Korean Air
31 Aug - 27 Sep	Korean Air
14 Aug - 07 Sep	Korean Air
26 Aug - 02 Sep	Korean Air
13 Aug - 25 Aug	Korean Air
22 Aug - 29 Aug	STARLUX Airlines
13 Aug - 31 Aug	STARLUX Airlines
09 Aug - 19 Aug	STARLUX Airlines
08 Aug - 31 Aug	STARLUX Airlines
29 Aug - 31 Aug	STARLUX Airlines
22 Aug - 26 Aug	STARLUX Airlines
08 Aug - 22 Aug	STARLUX Airlines

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

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 August from $768

Return flights