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

Return flights

17 Jun - 10 Jul	China Airlines
18 Jun - 23 Jun	China Airlines
17 Jun - 24 Jun	China Airlines
25 Jun - 10 Jul	China Airlines
16 Jun - 23 Jun	China Airlines
16 Jun - 21 Jun	China Airlines
29 Jun - 03 Jul	China Airlines
17 Jun - 19 Jun	China Airlines
19 Jun - 26 Jun	China Airlines
15 Jun - 22 Jun	China Airlines
26 Jun - 09 Jul	China Airlines
29 Jun - 02 Jul	China Airlines
24 Jun - 11 Jul	China Airlines
30 Jun - 03 Jul	China Airlines
23 Jun - 02 Jul	China Airlines
23 Jun - 03 Jul	China Airlines
28 Jun - 02 Jul	China Airlines
16 Jun - 25 Jun	China Airlines
22 Jun - 25 Jun	China Airlines
19 Jun - 23 Jun	China Airlines

Also check the deals for one-way flights from Ontario to Seoul 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 Seoul in June from $1340

Return flights