AirHint found the following cheapest return flights from Ontario (ONT) to Seoul (ICN) in January 2026 (see full year).

Return flights

05 Jan - 17 Jan	China Airlines
05 Jan - 26 Jan	China Airlines
12 Jan - 20 Jan	China Airlines
09 Jan - 16 Jan	China Airlines
19 Jan - 24 Jan	China Airlines
07 Jan - 14 Jan	China Airlines
19 Jan - 26 Jan	China Airlines
28 Jan - 07 Feb	China Airlines
14 Jan - 09 Feb	China Airlines
08 Jan - 18 Jan	China Airlines
18 Jan - 02 Feb	China Airlines
05 Jan - 16 Jan	China Airlines
06 Jan - 16 Jan	China Airlines
27 Jan - 04 Feb	China Airlines
13 Jan - 17 Feb	China Airlines
20 Jan - 10 Feb	China Airlines

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

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 January from $904

Return flights