Who cares about Berlin, Frankfurt is the big hub in Germany.
copy: "Nothing to Chicago, LA or Houston? How lame?"
No american airline offers direct flights to Berlin from Chicago, LA or Houston? How lame!
I had a somehow the same problem for Phoenix flights in the past. Only good connection I got that time was flight to London and than nonstop to Phoenix by British Airways. They cancelled that connection after two years, due to not enough passengers. But I loved it. I always had a row of seats for myself.
By the way, why donīt you charter a lear-jet?