I'm a Air Berlin Topbonus Gold member (matched from TK Elite), and thus OneWorld Sapphire elite. I'm flying with family on US Air using one of those companion certificates and wanted to enjoy the OneWorld elite benefits now that US is part of the alliance (i.e. free checked bags...)
Question is, do i have to include my Air Berlin FF number in the reservation to get the benefits? or can i just show them my elite status and get the benefits that way?
Also, if i assign the Air Berlin FF# to the reservation, can i than switch back to US or AA FF#? as i have intention of gathering Air Berlin miles. (i used to switch FF#s on delta all the time, but not very familiar with US).
tia