Yes, and thats the point.Supposing he starts out his RTW from CPH , when the final transatlantic leg from EWR to ARN is done , the ticket will still be left open for travel within Europe. Depending on the left over miles , he could then do say ARN-TFS (stop)-CPH (RTW complete), at a later time. Of course he would have to buy separate tickets between CPH and ARN, but it should be fairly easy to find el cheapo fares .