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

Return flights

15 Jan - 27 Jan	United	direct
04 Jan - 28 Jan	United	direct
07 Jan - 21 Jan	United	direct
28 Jan - 01 Feb	Air Premia
03 Jan - 16 Jan	United	direct
29 Jan - 01 Feb	Asiana Airlines	direct
28 Jan - 01 Feb	Delta	direct

Also check the deals for one-way flights from San Francisco 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 San Francisco to Seoul in January from $662

Return flights