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

Return flights

15 Mar - 23 Mar	Alaska Airlines
04 Mar - 08 Mar	Alaska Airlines
03 Mar - 06 Mar	Alaska Airlines
15 Mar - 20 Mar	Alaska Airlines
08 Mar - 15 Mar	Alaska Airlines
27 Mar - 02 Apr	Alaska Airlines
21 Mar - 27 Mar	Alaska Airlines
27 Mar - 03 Apr	Alaska Airlines
31 Mar - 07 Apr	Korean Air
18 Mar - 25 Mar	Korean Air
08 Mar - 25 Mar	Korean Air
24 Mar - 07 Apr	Korean Air
17 Mar - 26 Mar	Alaska Airlines
23 Mar - 29 Mar	Delta
22 Mar - 25 Apr	Korean Air
25 Mar - 01 Apr	Korean Air
26 Mar - 15 Apr	Korean Air
27 Mar - 04 Apr	Alaska Airlines
31 Mar - 14 Apr	Korean Air
31 Mar - 09 Apr	Korean Air

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 $624

Return flights