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

Return flights

11 Jul - 18 Jul	China Airlines
28 Jul - 26 Aug	China Airlines
29 Jul - 26 Aug	China Airlines
17 Jul - 24 Jul	China Airlines
30 Jul - 20 Aug	China Airlines
07 Jul - 14 Jul	China Airlines
24 Jul - 27 Aug	China Airlines
30 Jul - 15 Aug	China Airlines
31 Jul - 21 Aug	China Airlines
07 Jul - 21 Jul	China Airlines
28 Jul - 05 Aug	China Airlines
02 Jul - 18 Jul	China Airlines
10 Jul - 17 Jul	China Airlines
05 Jul - 18 Jul	China Airlines
04 Jul - 19 Jul	China Airlines
17 Jul - 02 Aug	China Airlines
08 Jul - 13 Aug	China Airlines
15 Jul - 06 Aug	China Airlines
04 Jul - 24 Jul	China Airlines
04 Jul - 18 Jul	China Airlines

Also check the deals for one-way flights from Ontario to Seoul in July.

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 July from $1156

Return flights