Cheapest return flights from Seattle to Seoul in April from 674€

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

Return flights

02 Apr - 09 Apr Air Canada
05 Apr - 03 May Air Canada
02 Apr - 12 Apr Air Canada
05 Apr - 29 Apr Korean Air direct
01 Apr - 19 Apr Korean Air direct
02 Apr - 09 Apr Korean Air direct
04 Apr - 12 Apr Air Canada
05 Apr - 03 May Korean Air direct
05 Apr - 30 Apr Delta direct
15 Apr - 29 Apr Delta direct
14 Apr - 29 Apr Delta direct
07 Apr - 21 Apr Delta direct
20 Apr - 04 May Delta direct
23 Apr - 23 May Delta direct

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

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The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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