Cheapest return flights from Seattle (SEA) to Seoul (ICN)

Cheapest month: November 2026, from $ 820. Book in one tap, or open a month for every date.

All destinations from Seattle (SEA)

One-wayReturn

  • November 2026

    24 Nov – 1 Dec 7 nights
    $ 820 return Cheapest month
    Cathay Pacific
    Price seen 10 Oct
    November dates

  • December 2026

    15 Dec – 20 Jul 2027 217 nights
    $ 1,703 return
    Direct Korean Air
    Price seen 9 Oct
    December dates

  • January 2027

    19 Jan – 20 Jul 2027 182 nights
    $ 1,059 return
    Air Canada
    Price seen 9 Oct
    January dates

  • July 2027

    20 Jul – 2 Aug 2027 13 nights
    $ 1,703 return
    Direct Korean Air
    Price seen 10 Oct
    July dates

  • August 2027

    9–16 Aug 2027 7 nights
    $ 1,667 return
    Direct Korean Air
    Price seen 9 Oct
    August dates
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Updated Oct 10, 2026.

About these fares

These results come from our latest search across airlines for your currency. Prices change quickly and are not locked until you complete booking—always confirm the total and fare rules on the partner site.

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