Cheapest return flights from Seattle to Seoul in September from 678€

AirHint found the following cheapest return flights from Seattle (SEA) to Seoul (ICN) in September 2025 (see full year).

Return flights

02 Sep - 08 Sep Air Canada
03 Sep - 13 Sep Air Canada
14 Sep - 21 Sep Air Canada
12 Sep - 17 Sep Air Canada
03 Sep - 15 Oct Air Canada
30 Sep - 10 Oct Air Canada
20 Sep - 28 Sep Air Canada
06 Sep - 14 Sep Alaska Airlines
06 Sep - 20 Sep Air Canada
05 Sep - 21 Sep Air Canada
06 Sep - 14 Sep Asiana Airlines direct
03 Sep - 13 Sep Asiana Airlines direct
30 Sep - 10 Oct Asiana Airlines direct
03 Sep - 15 Oct Asiana Airlines direct

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

Skyscanner

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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