Originally Posted by
MSPeconomist
It is true that DL won't permit folks to change the FF number on an itinerary after the first flight has been boarded/flown/past scheduled departure time. (I'm not sure of the exact technical rule, but you certainly can't change it during a connection/stopover. This means that all segments must be credited to the same FF program.
Right — but how come DL wouldn’t let me change the FF number before the departure of the first flight? And why would all the flights on DL metal credit to DL when the BP has my FB number?