AirHint found the following cheapest return flights from Bilbao (BIO) to Cologne (CGN) in September 2026 (see full year).
Return flights
| 25 Sep - 28 Sep | Wizz Air UK | ||
| 24 Sep - 27 Sep | Vueling Airlines | ||
| 03 Sep - 07 Sep | Vueling Airlines | ||
| 02 Sep - 06 Sep | Wizz Air Malta | ||
| 04 Sep - 06 Sep | Wizz Air UK |
Also check the deals for one-way flights from Bilbao to Cologne in September.
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