Cheapest return flights from San Francisco to Seoul in December from $661

Best time to book flights for San Francisco (SFO) to Seoul (ICN) flights at AirHint

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

Return flights

01 Dec - 04 Dec United direct
07 Dec - 20 Dec United direct
30 Dec - 29 Jan United direct
17 Dec - 28 Dec Air Premia direct
10 Dec - 27 Dec United direct
25 Dec - 16 Jan United direct
17 Dec - 29 Dec Air Premia direct
23 Dec - 26 Dec Korean Air
23 Dec - 26 Dec Asiana Airlines direct
01 Dec - 31 Dec United direct
25 Dec - 01 Jan United direct
28 Dec - 25 Jan Asiana Airlines direct
22 Dec - 23 Jan Korean Air direct
15 Dec - 28 Dec Air Premia direct
17 Dec - 31 Dec Air Premia direct
26 Dec - 09 Jan United direct
25 Dec - 09 Jan United direct
23 Dec - 08 Jan Delta
23 Dec - 08 Jan Asiana Airlines direct
18 Dec - 04 Jan Hawaiian Airlines

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

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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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