AirHint found the following cheapest return flights from Vienna (VIE) to Cologne (CGN) in September 2026 (see full year).
Return flights
| 18 Sep - 21 Sep | Austrian Airlines | direct | |
| 11 Sep - 01 Oct | Eurowings | direct | |
| 07 Sep - 10 Sep | Ryanair | direct | |
| 07 Sep - 21 Sep | Ryanair | direct |
Also check the deals for one-way flights from Vienna to Cologne in September.
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