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

Return flights

18 May - 25 May	Air Premia	direct
22 May - 25 May	Air Premia	direct
10 May - 18 May	Air Premia	direct
01 May - 11 May	Air Premia	direct
01 May - 10 May	Air Premia	direct
01 May - 05 May	United	direct
01 May - 09 May	United	direct
16 May - 23 May	Hawaiian Airlines
23 May - 30 May	Korean Air	direct
16 May - 23 May	Korean Air	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 510€

Return flights