Originally Posted by
renhelm
Once a FlyingBlue number is entered the Delta and KLM website won’t let me, the travel coordinator, or anyone else change it back to the original SkyMiles number. I get the message “Frequent Flyer Number can’t be changed once flights have commenced” even when the return flight has not begann.
What?
Amadeus Altea (Res system AFKL uses) and Amadeus Altea Airport (The DCS - Departure Control System) allow you to change the FF numbers as many times as you want (until the flight finalizes in the DCS).