My only elite status is with United. If I book a flight on say Expedia on US Airways, I can still earn United miles via the Star Alliance program (and get priority boarding etc). My question is, is there away to log in to a web site and choose my seat assignment (to include 'preferred' seating, using my elite status in Star Alliance? Or can I only do this if I have elite status with US Airways themselves? If I choose my seats on Expedia, it lets me, but then I get an email five minutes later telling me I cannot assign myself a seat because it is preferred. Thanks in advance.