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

Return flights

23 Mar - 30 Mar	Avianca
10 Mar - 14 Mar	United
18 Mar - 26 Mar	United
18 Mar - 25 Mar	United
09 Mar - 20 Mar	United
19 Mar - 25 Mar	United
29 Mar - 05 Apr	United
07 Mar - 27 Mar	United
21 Mar - 26 Mar	KLM
26 Mar - 10 Apr	United
21 Mar - 25 Mar	KLM
18 Mar - 27 Mar	United
28 Mar - 18 Apr	Air Canada
18 Mar - 03 Apr	United

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 1051€

Return flights