Cheapest return flights from Seattle to Seoul in September from 707€

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

Return flights

09 Sep - 22 Sep Air Canada
21 Sep - 29 Sep Air Canada
09 Sep - 17 Sep Air Canada
08 Sep - 17 Sep Air Canada
02 Sep - 16 Sep Air Canada
18 Sep - 25 Sep Air Canada
29 Sep - 20 Oct Air Canada
01 Sep - 19 Sep Air Canada
24 Sep - 28 Sep Air Canada
01 Sep - 31 Oct Air Canada
05 Sep - 21 Sep WestJet
15 Sep - 15 Oct Hawaiian Airlines
09 Sep - 25 Sep Hawaiian Airlines
28 Sep - 02 Oct Air Canada
26 Sep - 01 Oct Air Canada
15 Sep - 15 Oct Delta direct
29 Sep - 20 Oct Delta direct
26 Sep - 01 Oct Delta direct
28 Sep - 02 Oct Delta direct
01 Sep - 31 Oct Delta 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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