I've changed the PNR to use my DL GM number. If I don't need any changes to my flights I'll change my PNR back to the VS number at the gate.
Originally Posted by
MSPeconomist
From the viewpoint of DL, he's not a GM if his has some other FF number (for another airline program) associated with his PNR. He can't simultaneously use the flights to earn VS or whatever status and get DL elite benefits.