AirHint found the following cheapest one-way flights from Barcelona (BCN) to Cologne (CGN) in September 2025 (see full year).

One-Way flights

05 Sep	Ryanair	direct
12 Sep	Ryanair	direct
19 Sep	Ryanair	direct
06 Sep	Ryanair	direct
13 Sep	Ryanair	direct
04 Sep	Ryanair	direct
26 Sep	Ryanair	direct
03 Sep	Ryanair	direct
15 Sep	Ryanair	direct
10 Sep	Ryanair	direct

Also check the deals for return flights from Barcelona to Cologne 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.

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Cheapest one-way flights from Barcelona to Cologne in September from $34

One-Way flights