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

Return flights

22 Apr - 29 Apr	China Airlines
22 Apr - 28 May	China Airlines
20 Apr - 05 May	China Airlines
21 Apr - 28 Apr	China Airlines
10 Apr - 26 Apr	China Airlines
24 Apr - 10 May	China Airlines
26 Apr - 26 May	China Airlines
12 Apr - 28 Apr	China Airlines
11 Apr - 26 Apr	China Airlines
21 Apr - 09 May	China Airlines
05 Apr - 22 Apr	China Airlines
01 Apr - 11 Apr	China Airlines

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

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 April from $1004

Return flights