Just FYI, from CPH
BA has 6 daily flights to LHR - same from ARN (5?) + 3 LCY flights
LH/SK has 9 daily flights to FRA - vs. 8 from ARN
LH/SK has 6 daily flights to MUC - vs. 5 from ARN
KL has 6 daily flights to AMS - vs. 5 from ARN
AF has 4 daily flights to CDG - vs. 3 from ARN
I have not counted the number of seats - but regardless the connection traffice to other European hubs is substantial from both ARN and CPH.