Transporting bicycles by air from Copenhagen

Hi, does anyone know anything about transporting bikes by air from Copenhagen airport? We are flying out in a few days and need to box up and check our bicycles. Our flight leaves early in the morning so we are wondering if we can box them up and check them in advance but neither KLM nor the airport seems to have info about that. Also, do they sell bike boxes at Copenhagen airport does anyone know? If not, any good taxi services that transport boxed bikes? We would be transporting three.

Thanks! Sarah