AirHint found the following cheapest return flights from Ontario (ONT) to Bangkok (BKK) in June 2025 (see full year).

Return flights

29 Jun - 13 Jul	Korean Air
27 Jun - 23 Jul	Korean Air
16 Jun - 02 Jul	Korean Air
27 Jun - 29 Jun	Korean Air
24 Jun - 08 Jul	China Airlines
28 Jun - 12 Jul	STARLUX Airlines
30 Jun - 03 Jul	China Airlines
25 Jun - 03 Jul	China Airlines
23 Jun - 01 Jul	China Airlines
25 Jun - 09 Jul	China Airlines
25 Jun - 02 Jul	China Airlines
23 Jun - 30 Jun	China Airlines
20 Jun - 27 Jun	Korean Air
20 Jun - 22 Jun	STARLUX Airlines
21 Jun - 26 Jun	China Airlines
25 Jun - 30 Jun	China Airlines
22 Jun - 30 Jun	China Airlines
18 Jun - 22 Jun	STARLUX Airlines
22 Jun - 26 Jun	China Airlines
22 Jun - 29 Jun	China Airlines

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

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 June from $1149

Return flights