Cheapest one-way flights from Ontario to Seoul in September from $453

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

One-Way flights

06 Sep Alaska Airlines
05 Sep Alaska Airlines
04 Sep Alaska Airlines
09 Sep Alaska Airlines
24 Sep China Airlines
11 Sep Alaska Airlines
18 Sep China Airlines
21 Sep Frontier Airlines
22 Sep Frontier Airlines
13 Sep China Airlines

Also check the deals for return flights from Ontario to Seoul in September.

Skyscanner

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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