Originally Posted by
yyzprincess
Yes, AC does. AC has 2 fields. I do it regularly now that I fly more often on AC due to their enhance customer service & SE benefits.. WL for Upgrade & credited miles to UA.
My upgrades have always cleared with UA MP # for FF credit. AC SE # for my SE benefits.
AC gets the lionshare of my fare instead of UA.
How does one go about doing this - at check in? Are agents willing to do this for you?