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

Return flights

23 Mar - 06 Apr	Korean Air
05 Mar - 19 Mar	Korean Air
01 Mar - 08 Mar	China Airlines
03 Mar - 10 Mar	China Airlines
20 Mar - 03 Apr	China Airlines
14 Mar - 05 Apr	China Airlines
16 Mar - 29 Mar	China Airlines
27 Mar - 01 Apr	China Airlines
20 Mar - 25 Apr	China Airlines
29 Mar - 18 Apr	China Airlines
27 Mar - 02 Apr	China Airlines
26 Mar - 12 Apr	China Airlines
25 Mar - 02 Apr	China Airlines
27 Mar - 03 Apr	China Airlines
01 Mar - 18 Mar	China Airlines
15 Mar - 19 Mar	China Airlines
08 Mar - 21 Mar	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 $793

Return flights