Cheapest return flights from Ontario to Bangkok in September from $579

AirHint found the following cheapest return flights from Ontario (ONT) to Bangkok (BKK) in September 2026 (see full year).

Return flights

15 Sep - 23 Sep Korean Air
29 Sep - 27 Oct Korean Air
01 Sep - 14 Sep Korean Air
15 Sep - 22 Sep Korean Air
24 Sep - 29 Sep Korean Air
02 Sep - 30 Sep Korean Air
02 Sep - 09 Sep Korean Air
15 Sep - 29 Sep Korean Air
06 Sep - 17 Sep Korean Air
04 Sep - 12 Sep Korean Air
27 Sep - 04 Oct China Airlines
23 Sep - 21 Oct China Airlines
16 Sep - 30 Sep China Airlines
25 Sep - 11 Oct China Airlines
24 Sep - 11 Oct China Airlines
19 Sep - 10 Oct China Airlines

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

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