Cheapest return flights from San Jose to Seoul in April from $708

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

Return flights

29 Apr - 06 May Alaska Airlines
20 Apr - 03 May Alaska Airlines
22 Apr - 28 Apr Korean Air
21 Apr - 28 Apr Korean Air
22 Apr - 19 May Korean Air
18 Apr - 03 May Alaska Airlines
01 Apr - 08 Apr Delta
23 Apr - 03 May Alaska Airlines
26 Apr - 03 May Alaska Airlines
27 Apr - 04 May Alaska Airlines
18 Apr - 04 May Alaska Airlines
12 Apr - 17 Apr Korean Air
08 Apr - 15 Apr Korean Air
10 Apr - 24 Apr Korean Air
17 Apr - 01 May Korean Air
24 Apr - 08 May Korean Air
15 Apr - 29 Apr Korean Air
06 Apr - 17 Apr Korean Air
13 Apr - 22 Apr Korean Air
17 Apr - 27 Apr Korean Air

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

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