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

Return flights

02 Dec - 06 Dec	Air Canada
04 Dec - 05 Dec	Air Canada
01 Dec - 08 Dec	Air Canada
18 Dec - 26 Dec	Air China
23 Dec - 30 Dec	Air China
25 Dec - 30 Dec	Air China
22 Dec - 29 Dec	Air China
23 Dec - 29 Dec	Air China
24 Dec - 30 Dec	Air Canada
02 Dec - 12 Dec	Air Canada
25 Dec - 02 Jan	China Airlines
23 Dec - 02 Jan	China Airlines
24 Dec - 02 Jan	China Airlines
28 Dec - 05 Jan	China Airlines
25 Dec - 02 Jan	Korean Air	direct
23 Dec - 02 Jan	Korean Air	direct
24 Dec - 02 Jan	Korean Air	direct
28 Dec - 05 Jan	Asiana Airlines	direct

Also check the deals for one-way flights from Seoul to San Francisco in December.

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 Seoul to San Francisco in December from 408€

Return flights