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

Return flights

05 Jan - 27 Jan	China Airlines
25 Jan - 05 Feb	China Airlines
16 Jan - 21 Jan	China Airlines
05 Jan - 14 Jan	China Airlines
18 Jan - 24 Jan	China Airlines
26 Jan - 02 Feb	China Airlines
04 Jan - 18 Jan	China Airlines
14 Jan - 28 Jan	China Airlines
15 Jan - 20 Jan	China Airlines
04 Jan - 14 Jan	China Airlines
28 Jan - 08 Feb	China Airlines
02 Jan - 18 Jan	China Airlines
01 Jan - 15 Jan	China Airlines
30 Jan - 22 Feb	Qatar Airways

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 935€

Return flights