ARGUS rental desk at Cologne AirportCologne Airport is open at the following times: , Monday from 07:00 until 00:00, Tuesday from 07:00 until 00:00, Wednesday from 07:00 until 00:00, Thursday from 07:00 until 00:00, Friday from 07:00 until 00:00, Saturday from 07:00 until 00:00, Sunday from 07:00 until 00:00