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

Return flights

26 Mar - 04 Apr	Korean Air
01 Mar - 31 Mar	Korean Air
11 Mar - 25 Mar	Korean Air
13 Mar - 23 Mar	Korean Air
19 Mar - 31 Mar	Korean Air
19 Mar - 26 Mar	Korean Air
06 Mar - 16 Mar	Korean Air
03 Mar - 10 Mar	Korean Air
01 Mar - 20 Mar	Korean Air
11 Mar - 16 Mar	Korean Air
03 Mar - 26 Mar	Korean Air
20 Mar - 13 Apr	Korean Air
10 Mar - 06 Apr	Korean Air
14 Mar - 05 Apr	Korean Air
31 Mar - 29 Apr	Korean Air
25 Mar - 13 Apr	Korean Air
25 Mar - 04 Apr	Korean Air
24 Mar - 03 Apr	Korean Air
20 Mar - 03 Apr	China Airlines
20 Mar - 25 Apr	China Airlines

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

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 March from $673

Return flights