AirHint found the following cheapest return flights from Bilbao (BIO) to Cologne (CGN) in December 2025 (see full year).

Return flights

11 Dec - 14 Dec	Vueling Airlines
13 Dec - 15 Dec	Vueling Airlines
25 Dec - 31 Dec	Vueling Airlines
11 Dec - 15 Dec	Vueling Airlines
29 Dec - 04 Jan	Vueling Airlines
12 Dec - 15 Dec	Vueling Airlines
10 Dec - 14 Dec	Volotea
11 Dec - 17 Dec	Vueling Airlines
09 Dec - 13 Dec	Vueling Airlines
12 Dec - 16 Dec	Vueling Airlines
17 Dec - 20 Dec	Vueling Airlines

Also check the deals for one-way flights from Bilbao to Cologne in December.

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.

Book a cheap hotel in Cologne

Cheap car rent in Cologne

Cheapest return flights from Bilbao to Cologne in December from $165

Return flights