American Airlines has just added Air Berlin to their One World program. This is a great addition for us spending time in Europe. Air Berlin flies most anywhere in Europe and we can use our AA ff miles and accumulate AA ff miles on Air Berlin. We just flew from Hamburg to Munich on Air Berlin and were allowed to use their Hamburg Lounge with our The Lounge card. The Hamburg Airport Lounge is a first rate Lounge, with all the goodies and in addition, showers, smoking rooms and Resting rooms with comfortable beds. We felt rather pampered..