AirHint found the following cheapest return flights from Oakland (OAK) to Seoul (ICN) in January 2026 (see full year).

Return flights

15 Jan - 22 Jan	Alaska Airlines
21 Jan - 02 Feb	Alaska Airlines
25 Jan - 02 Feb	Alaska Airlines
31 Jan - 05 Feb	Alaska Airlines
24 Jan - 08 Feb	Alaska Airlines
29 Jan - 01 Feb	Alaska Airlines
22 Jan - 09 Feb	Alaska Airlines
11 Jan - 24 Jan	Alaska Airlines
06 Jan - 21 Jan	Korean Air
01 Jan - 08 Jan	Korean Air
01 Jan - 07 Jan	Korean Air
04 Jan - 17 Jan	Korean Air
03 Jan - 16 Jan	Korean Air
02 Jan - 13 Jan	Korean Air
01 Jan - 06 Jan	Korean Air
04 Jan - 18 Jan	Korean Air
21 Jan - 18 Feb	Korean Air
30 Jan - 20 Feb	Korean Air
20 Jan - 17 Feb	Korean Air

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

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 January from $615

Return flights