Cheapest one-way flights from Seattle to Seoul in September from $406

Best time to book flights for Seattle (SEA) to Seoul (ICN) flights at AirHint

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

One-Way flights

11 Sep WestJet
03 Sep WestJet
12 Sep WestJet
30 Sep WestJet
22 Sep Hawaiian Airlines
23 Sep Hawaiian Airlines
28 Sep Hawaiian Airlines
21 Sep Alaska Airlines
23 Sep Korean Air direct
12 Sep Korean Air direct

Also check the deals for return 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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