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

Return flights

12 Mar - 24 Mar	United
10 Mar - 17 Mar	United
23 Mar - 06 Apr	United
12 Mar - 25 Mar	United
13 Mar - 24 Mar	United
13 Mar - 25 Mar	United
12 Mar - 26 Mar	United
09 Mar - 14 Mar	United
13 Mar - 26 Mar	United
26 Mar - 13 Apr	United
25 Mar - 09 Apr	United
07 Mar - 21 Mar	United
27 Mar - 13 Apr	United
28 Mar - 12 Apr	Air Canada
27 Mar - 12 Apr	Air Canada
26 Mar - 12 Apr	Air Canada

Also check the deals for one-way flights from San Jose to Seoul in March.

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 March from $1498

Return flights