Cheapest one-way flights from Seattle to Seoul in October from $418

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
02 Oct WestJet
16 Oct WestJet
01 Oct WestJet
23 Oct WestJet
02 Oct Alaska Airlines direct
16 Oct Alaska Airlines direct
15 Oct Alaska Airlines direct
20 Oct Air Canada
01 Oct Delta 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.

Book a cheap hotel in Seoul

Cheap car rent in Seoul