Cheapest return flights from Seattle to Copenhagen in September from $531

AirHint found the following cheapest return flights from Seattle (SEA) to Copenhagen (CPH) in September 2026 (see full year).

Return flights

04 Sep - 27 Sep Delta
15 Sep - 22 Sep Scandinavian Airlines direct
01 Sep - 08 Sep Scandinavian Airlines direct
08 Sep - 15 Sep Scandinavian Airlines direct
29 Sep - 06 Oct Scandinavian Airlines direct
20 Sep - 27 Sep Scandinavian Airlines direct
06 Sep - 13 Sep Scandinavian Airlines direct
13 Sep - 20 Sep Scandinavian Airlines direct
27 Sep - 04 Oct Scandinavian Airlines direct
04 Sep - 27 Sep Scandinavian Airlines direct
18 Sep - 25 Sep Scandinavian Airlines direct
19 Sep - 26 Sep Scandinavian Airlines direct
25 Sep - 02 Oct Scandinavian Airlines direct
26 Sep - 03 Oct Scandinavian Airlines direct

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

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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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