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

Return flights

13 Apr - 20 Apr	Korean Air
14 Apr - 23 Apr	Korean Air
03 Apr - 26 Apr	Korean Air
02 Apr - 26 Apr	Korean Air
09 Apr - 23 Apr	China Airlines
12 Apr - 26 Apr	China Airlines
01 Apr - 13 Apr	China Airlines
10 Apr - 24 Apr	China Airlines
15 Apr - 19 Apr	China Airlines
05 Apr - 20 Apr	China Airlines
08 Apr - 06 May	China Airlines
30 Apr - 13 May	China Airlines
29 Apr - 13 May	China Airlines
09 Apr - 26 May	China Airlines
26 Apr - 27 May	China Airlines
22 Apr - 04 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.

Book a cheap hotel in Bangkok

Cheap car rent in Bangkok

Cheapest return flights from Ontario to Bangkok in April from $691

Return flights