Cheapest return flights from Seoul to San Francisco in May from $446

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

Return flights

29 May - 07 Jun Air Premia direct
27 May - 03 Jun Air Premia direct
03 May - 29 May Air Premia direct
01 May - 06 May Air Premia direct
01 May - 31 May Air Premia direct
13 May - 20 May Air Premia direct
01 May - 10 May Air Premia direct
08 May - 15 May Air Premia direct
04 May - 15 May Air Premia direct
20 May - 25 May Air Premia direct
01 May - 22 May Air Premia direct
08 May - 17 May Air Premia direct
28 May - 01 Jun Air Canada
28 May - 01 Jun Korean Air direct

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

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