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

Return flights

04 May - 11 May	Air Premia	direct
06 May - 13 May	Air Premia	direct
01 May - 10 May	United	direct
01 May - 06 May	United	direct
01 May - 13 May	Air Premia	direct
04 May - 07 May	United	direct
11 May - 22 May	Air Premia	direct
06 May - 15 May	Air Premia	direct
01 May - 09 May	United	direct
15 May - 19 May	United	direct
18 May - 06 Jun	EVA Air
18 May - 06 Jun	Asiana Airlines	direct

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

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 May from $466

Return flights