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

Return flights

03 Apr - 12 Apr	Korean Air
07 Apr - 23 Apr	Korean Air
13 Apr - 07 May	Korean Air
23 Apr - 07 May	Korean Air
06 Apr - 20 Apr	Korean Air
09 Apr - 26 Apr	Korean Air
19 Apr - 26 Apr	Korean Air
06 Apr - 22 Apr	Korean Air
22 Apr - 22 May	Korean Air
06 Apr - 06 May	Korean Air
10 Apr - 11 May	Korean Air
07 Apr - 30 Apr	Korean Air
10 Apr - 18 Apr	China Airlines
02 Apr - 10 Apr	China Airlines
05 Apr - 20 Apr	China Airlines
26 Apr - 02 May	China Airlines

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

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 April from $701

Return flights