Cheapest return flights from Ontario to Seoul in September from $929

AirHint found the following cheapest return flights from Ontario (ONT) to Seoul (ICN) in September 2025 (see full year).

Return flights

11 Sep - 24 Sep China Airlines
18 Sep - 21 Oct China Airlines
01 Sep - 15 Sep China Airlines
04 Sep - 11 Sep China Airlines
11 Sep - 18 Sep China Airlines
03 Sep - 10 Sep China Airlines
15 Sep - 25 Sep China Airlines
16 Sep - 23 Sep China Airlines
01 Sep - 08 Sep China Airlines
10 Sep - 23 Sep China Airlines
01 Sep - 10 Sep China Airlines
30 Sep - 21 Oct China Airlines
18 Sep - 20 Oct China Airlines
04 Sep - 09 Oct China Airlines
29 Sep - 30 Oct China Airlines
23 Sep - 28 Oct China Airlines
01 Sep - 08 Oct China Airlines
18 Sep - 08 Oct China Airlines
08 Sep - 10 Oct China Airlines
28 Sep - 21 Oct China Airlines

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

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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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