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

Return flights

07 Apr - 17 Apr	Qatar Airways
02 Apr - 17 Apr	Qatar Airways
06 Apr - 17 Apr	Qatar Airways
06 Apr - 13 Apr	Qatar Airways
05 Apr - 17 Apr	Qatar Airways
03 Apr - 17 Apr	Air Canada
03 Apr - 11 Apr	Air Canada
05 Apr - 18 Apr	Air Canada
02 Apr - 11 Apr	Qatar Airways
04 Apr - 17 Apr	Qatar Airways

Also check the deals for one-way flights from San Jose to Seoul 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 San Jose to Seoul in April from 1682€

Return flights