Cheapest one-way flights from Seattle to Seoul in October from $459

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 October 2025 (see full year).

One-Way flights

15 Oct WestJet
05 Oct WestJet
20 Oct Alaska Airlines
14 Oct China Airlines
12 Oct Alaska Airlines
03 Oct China Airlines
04 Oct Air Canada
20 Oct Asiana Airlines direct
17 Oct Asiana Airlines direct
15 Oct Asiana Airlines direct

Also check the deals for return flights from Seattle to Seoul in October.

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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