Cheapest return flights from Copenhagen to Seattle in September from $543
AirHint found the following cheapest return flights from Copenhagen (CPH) to Seattle (SEA) in September 2025 (see full year).
Return flights
| 17 Sep - 03 Oct | Icelandair | ||
| 17 Sep - 03 Oct | Scandinavian Airlines | direct |
Also check the deals for one-way flights from Copenhagen to Seattle in September.
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.
