Cheapest one-way flights from Ontario (ONT) to Seoul (ICN), October

10 dates in October, from $ 543. Book in one tap, or check whether to buy now or wait.

One-wayReturn
Dates, airline, and price
Dates Airline Price
26 Oct Frontier Airlines
28 Oct Frontier Airlines
19 Oct China Airlines
27 Oct China Airlines
18 Oct China Airlines
22 Oct Korean Air
21 Oct Korean Air
23 Oct Alaska Airlines
17 Oct Alaska Airlines
16 Oct China Airlines
Powered by

Cheapest deals for the full year

Deals for return flights from Ontario to Seoul in October.

Book a cheap hotel in Seoul

Cheap car rent in Incheon Intl

Updated Oct 15, 2026.

About these fares

These results come from our latest search across airlines for your currency. Prices change quickly and are not locked until you complete booking—always confirm the total and fare rules on the partner site.

Feel free to contact us with any feedback or request another flight research.