I'm looking at an itinerary KCH-KUL-TPE on Malaysian and then China Airlines. I'd like to credit the first flight to my British Airways Executive Club account and the second leg to Skymiles.
This will be booked on Expedia, so I'm not sure how easy it is to put both FF #s into the PNR, and whether this can be done enroute? I can imagine reissuing the boarding pass in KUL? Has anyone ever done this itinerary (or similar) and changed FF #s enroute?