Cheapest return flights from Ontario to Bangkok in September from $752

Best time to book flights for Ontario (ONT) to Bangkok (BKK) flights at AirHint

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

Return flights

18 Sep - 21 Oct Korean Air
09 Sep - 23 Sep Korean Air
01 Sep - 07 Sep China Airlines
17 Sep - 24 Sep China Airlines
15 Sep - 22 Sep China Airlines
03 Sep - 02 Oct China Airlines
03 Sep - 24 Sep China Airlines
01 Sep - 17 Sep China Airlines
03 Sep - 17 Sep China Airlines
02 Sep - 17 Sep China Airlines
01 Sep - 30 Sep China Airlines
03 Sep - 10 Sep China Airlines
24 Sep - 23 Oct China Airlines
30 Sep - 17 Oct China Airlines
20 Sep - 04 Oct STARLUX Airlines
27 Sep - 04 Oct STARLUX Airlines
28 Sep - 08 Oct China Airlines
07 Sep - 31 Oct China Airlines

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

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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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