Cheapest return flights from Seattle to Seoul in April from $1022

AirHint found the following cheapest return flights from Seattle (SEA) to Seoul (GMP) in April 2026 (see full year).

Return flights

30 Apr - 30 May EVA Air
23 Apr - 23 May EVA Air
03 Apr - 11 Apr EVA Air
14 Apr - 24 Apr EVA Air
20 Apr - 04 May ANA
07 Apr - 27 Apr ANA
07 Apr - 07 May ANA
24 Apr - 24 May ANA
07 Apr - 05 May ANA
08 Apr - 27 Apr ANA
11 Apr - 24 Apr Japan Airlines
01 Apr - 30 Apr Japan Airlines
02 Apr - 16 Apr Japan Airlines

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

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