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

Return flights

24 Jun - 01 Jul	China Airlines
13 Jun - 20 Jun	China Airlines
01 Jun - 13 Jun	China Airlines
11 Jun - 18 Jun	China Airlines
11 Jun - 20 Jun	China Airlines
07 Jun - 13 Jun	China Airlines
17 Jun - 03 Jul	China Airlines
17 Jun - 08 Jul	China Airlines
23 Jun - 09 Jul	China Airlines
11 Jun - 21 Jun	China Airlines
25 Jun - 04 Jul	China Airlines
19 Jun - 23 Jun	China Airlines
12 Jun - 19 Jul	China Airlines
10 Jun - 22 Jun	STARLUX Airlines
12 Jun - 26 Jun	STARLUX Airlines
29 Jun - 17 Jul	STARLUX Airlines
12 Jun - 12 Jul	STARLUX Airlines
29 Jun - 12 Jul	STARLUX Airlines
10 Jun - 20 Jun	STARLUX Airlines
28 Jun - 12 Jul	Qatar Airways

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 1072€

Return flights