Cheapest return flights from Seoul to San Francisco in December from $432

AirHint found the following cheapest return flights from Seoul (ICN) to San Francisco (SFO) in December 2025 (see full year).

Return flights

17 Dec - 31 Dec Air Premia direct
15 Dec - 29 Dec Air Premia direct
15 Dec - 31 Dec Air Premia direct
17 Dec - 03 Jan Air Premia direct
17 Dec - 21 Jan Air Premia direct
21 Dec - 11 Jan Alaska Airlines
20 Dec - 03 Jan Alaska Airlines
21 Dec - 31 Dec Alaska Airlines
22 Dec - 04 Jan Air Premia direct
12 Dec - 09 Jan Air Premia direct
07 Dec - 29 Dec Air Premia direct
22 Dec - 31 Dec Air Premia direct
21 Dec - 29 Dec Air Premia direct
26 Dec - 31 Dec Air Premia direct
27 Dec - 03 Jan Air Premia direct
22 Dec - 05 Jan Air Premia direct
26 Dec - 04 Jan Air Premia direct
19 Dec - 29 Dec United direct
24 Dec - 29 Dec United direct
10 Dec - 10 Jan Air Canada

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

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