Cheapest return flights from Seattle to Seoul in May from $689

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

Return flights

06 May - 21 May Cathay Pacific
04 May - 08 May Cathay Pacific
12 May - 19 May Cathay Pacific
10 May - 19 May Philippine Airlines
12 May - 28 Jun Cathay Pacific
10 May - 16 May Alaska Airlines
09 May - 24 May Korean Air direct
06 May - 21 May Korean Air direct
12 May - 22 May Korean Air direct
10 May - 19 May Korean Air direct
12 May - 28 Jun Korean Air direct
02 May - 06 Jun Korean Air
10 May - 27 May Korean Air direct
16 May - 06 Jun Air Canada
19 May - 02 Jun ANA
02 May - 06 Jun Korean Air direct
26 May - 25 Jun WestJet
26 May - 29 Jun Alaska Airlines
27 May - 29 Jun Alaska Airlines
26 May - 25 Jun Korean Air direct

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

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