AirHint found the following cheapest return flights from Oakland (OAK) to Seoul (ICN) in October 2025 (see full year).

Return flights

02 Oct - 15 Oct	Korean Air
22 Oct - 29 Oct	Korean Air
12 Oct - 19 Oct	Korean Air
14 Oct - 28 Oct	Korean Air
22 Oct - 05 Nov	Korean Air
22 Oct - 02 Nov	Korean Air
24 Oct - 08 Nov	Korean Air
15 Oct - 01 Nov	Korean Air
05 Oct - 24 Nov	Korean Air
29 Oct - 13 Nov	Korean Air
19 Oct - 01 Nov	Korean Air
17 Oct - 01 Nov	Korean Air
26 Oct - 18 Nov	Korean Air
26 Oct - 13 Nov	Korean Air
12 Oct - 27 Oct	Korean Air
18 Oct - 25 Oct	Korean Air
16 Oct - 25 Oct	Korean Air
27 Oct - 31 Oct	Korean Air
01 Oct - 22 Oct	Korean Air
01 Oct - 13 Oct	Korean Air

Also check the deals for one-way flights from Oakland to Seoul in October.

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 Oakland to Seoul in October from $838

Return flights