AirHint found the following cheapest return flights from Washington (IAD) to Copenhagen (CPH) in September 2026 (see full year).
Return flights
| 02 Sep - 17 Sep | Scandinavian Airlines | ||
| 02 Sep - 08 Sep | TAP | ||
| 03 Sep - 09 Sep | Air Canada | ||
| 03 Sep - 09 Sep | Scandinavian Airlines | direct | |
| 04 Sep - 26 Sep | Air Canada |
Also check the deals for one-way flights from Washington to Copenhagen in September.
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