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

Return flights

08 Apr - 22 Apr	China Airlines
10 Apr - 23 Apr	China Airlines
10 Apr - 17 Apr	China Airlines
07 Apr - 20 Apr	China Airlines
18 Apr - 29 Apr	China Airlines
07 Apr - 21 Apr	China Airlines
17 Apr - 20 Apr	China Airlines
09 Apr - 23 Apr	China Airlines
15 Apr - 22 Apr	China Airlines
24 Apr - 10 May	China Airlines
29 Apr - 09 May	China Airlines
05 Apr - 12 Apr	China Airlines
18 Apr - 03 May	China Airlines
24 Apr - 04 May	China Airlines
13 Apr - 01 May	China Airlines
02 Apr - 11 May	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 917€

Return flights