Cheapest return flights from Seattle to Copenhagen in September from 407€

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

Return flights

10 Sep - 04 Oct Icelandair
14 Sep - 04 Oct Icelandair
04 Sep - 11 Sep Icelandair
10 Sep - 17 Sep Icelandair
10 Sep - 16 Sep Icelandair
05 Sep - 12 Sep Icelandair
09 Sep - 16 Sep Icelandair
30 Sep - 07 Oct Icelandair
24 Sep - 01 Oct Icelandair
28 Sep - 05 Oct Icelandair
25 Sep - 02 Oct Icelandair
27 Sep - 04 Oct Icelandair
29 Sep - 06 Oct Icelandair
07 Sep - 15 Sep Icelandair
16 Sep - 23 Sep Icelandair
22 Sep - 29 Sep Icelandair
21 Sep - 28 Sep Icelandair
23 Sep - 30 Sep Icelandair
26 Sep - 03 Oct Icelandair

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