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

Return flights

15 Mar - 25 Mar	Korean Air
16 Mar - 25 Mar	Korean Air
15 Mar - 23 Mar	Korean Air
16 Mar - 23 Mar	Korean Air
22 Mar - 28 Apr	Korean Air
17 Mar - 14 Apr	Korean Air
15 Mar - 27 Mar	Korean Air
03 Mar - 17 Mar	Delta
18 Mar - 25 Mar	Korean Air
11 Mar - 23 Mar	Korean Air
18 Mar - 01 Apr	Korean Air
02 Mar - 10 Mar	Korean Air
05 Mar - 25 Mar	Korean Air
16 Mar - 02 Apr	Korean Air
25 Mar - 05 Apr	Korean Air
27 Mar - 09 Apr	Korean Air
26 Mar - 07 Apr	Korean Air
29 Mar - 12 Apr	China Airlines
04 Mar - 27 Apr	China Airlines
21 Mar - 12 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 $570

Return flights