Cheapest return flights from Seattle to Seoul in April from $680

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

Return flights

13 Apr - 25 Apr Air Canada
08 Apr - 09 May Air Canada
20 Apr - 14 May Air Canada
14 Apr - 28 Apr Air Canada
16 Apr - 28 Apr Air Canada
15 Apr - 22 Apr Air Canada
07 Apr - 21 Apr Air Canada
10 Apr - 11 May Air Canada
15 Apr - 23 Apr Alaska Airlines
07 Apr - 19 Apr Air Canada
16 Apr - 23 Apr Korean Air
10 Apr - 19 Apr Korean Air
17 Apr - 26 Apr Asiana Airlines
20 Apr - 24 May Air Canada
15 Apr - 31 May Asiana Airlines
18 Apr - 10 May Asiana Airlines
24 Apr - 03 May Korean Air direct
20 Apr - 14 May Asiana Airlines direct
22 Apr - 03 May Air Canada
30 Apr - 30 May Korean Air direct

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

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