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

Return flights

01 Dec - 06 Dec	Air Canada
01 Dec - 08 Dec	Air Canada
18 Dec - 27 Dec	Air China
18 Dec - 01 Jan	Air China
24 Dec - 30 Dec	Air Canada
25 Dec - 30 Dec	Air Canada
26 Dec - 01 Jan	Air Canada
01 Dec - 07 Dec	Air Canada
23 Dec - 29 Dec	China Airlines
22 Dec - 29 Dec	China Airlines
15 Dec - 27 Dec	China Airlines
16 Dec - 27 Dec	China Airlines
23 Dec - 01 Jan	Air Canada
28 Dec - 02 Jan	Air Canada
28 Dec - 05 Jan	Air Canada
27 Dec - 02 Jan	Air Canada
30 Dec - 04 Jan	Air Canada
23 Dec - 01 Jan	Korean Air	direct
24 Dec - 02 Jan	Korean Air	direct
18 Dec - 01 Jan	Korean Air	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 465€

Return flights