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

Return flights

29 Apr - 13 May	Air Premia	direct
24 Apr - 01 May	Air Premia	direct
27 Apr - 04 May	Air Premia	direct
04 Apr - 11 Apr	United	direct
11 Apr - 18 Apr	United	direct
03 Apr - 12 Apr	United	direct
03 Apr - 10 Apr	Air Premia	direct
30 Apr - 04 May	United	direct
23 Apr - 25 Apr	United	direct
30 Apr - 05 May	United	direct
28 Apr - 13 May	United	direct
30 Apr - 13 May	United	direct
26 Apr - 05 May	China Airlines
23 Apr - 30 Apr	China Airlines
26 Apr - 05 May	United	direct

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

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 April from $466

Return flights