AirHint found the following cheapest return flights from Seattle (SEA) to Copenhagen (CPH) in October 2025 (see full year).
Return flights
| 21 Oct - 28 Oct | Lufthansa | ||
| 20 Oct - 27 Oct | Air France | ||
| 23 Oct - 29 Oct | Lufthansa | ||
| 17 Oct - 24 Oct | Lufthansa | ||
| 17 Oct - 24 Oct | Scandinavian Airlines | direct | |
| 18 Oct - 26 Oct | Hawaiian Airlines |
Also check the deals for one-way flights from Seattle to Copenhagen in October.
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