Fewer words will test the mettle of a loyalty plan operator than these: Merge 100 million frequent flyers, and do it without a hitch.
That is the number of loyalty plan members American Airlines and US Airways will have to combine once the two companies merge. That task may be a while off, but make no mistake, the people responsible for managing these programs are already thinking about it.
One of the most difficult and critical steps of a major merger, particularly in the airline....