A friend of mine just asked me this question and I was unable to answer it:
He booked a trip on Orbitz flying Delta from JFK to ORD (via DTW I believe) and continuing on United to Omaha. He is an Elite with Delta, but not with United. Will he have to pay a fee for his bags or not (as a SkyMiles Elite he of course is exempt from the fee on DL) and will hi bag even be checked through to OMA?
Can anybody help us answer this question? Also, what would happen if he flew UA first and then DL? How about if he weren't Elite with either? Would he have to pay twice?