Originally Posted by
exerda
I would assume if your new MP # is the same as your old CO OP#, that credits to CO and the old OP # will likewise credit
This is what happened to me this past weekend. I flew LAX-EWR on Mar 1st and EWR-LAX on Mar 4th. I used my old CO OnePass number outbound (prior to the computer integration), and my new UA MileagePlus number on the return (same # as the outbound, the system did this automatically). LAX-EWR posted on Mar 5th and EWR-LAX posted on Mar 6th.