The UA website is offering RT economy award travel on this route for those dates for 30,000 miles and approximately $100 for fees and taxes. The long-distance flights are on LH and require a change in Germany (Munich or Frankfurt flying to CPH; Munich on the return). The flights within Europe are either LH or SAS.

As gov1976 indicated, the AA website doesn't allow booking award travel on AB, AY or IB. You can, however, check the schedules for those airlines on the AA website, so that you know what you're looking for when you phone AA.