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

Return flights

22 Jan - 25 Jan	Frontier Airlines
20 Jan - 25 Feb	China Airlines
24 Jan - 24 Feb	China Airlines
08 Jan - 22 Jan	China Airlines
24 Jan - 08 Feb	China Airlines
07 Jan - 21 Jan	China Airlines
05 Jan - 17 Jan	China Airlines
05 Jan - 21 Jan	China Airlines
07 Jan - 16 Jan	China Airlines
04 Jan - 17 Jan	China Airlines
20 Jan - 29 Jan	China Airlines
20 Jan - 05 Feb	China Airlines
18 Jan - 23 Jan	China Airlines
17 Jan - 24 Jan	China Airlines
28 Jan - 04 Feb	Qatar Airways
13 Jan - 04 Feb	Qatar Airways
31 Jan - 07 Feb	China Airlines
28 Jan - 13 Feb	Qatar Airways
14 Jan - 04 Feb	Qatar Airways
14 Jan - 20 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 744€

Return flights