Originally Posted by WhiskeyBravo

I actually asked a phone agent about this yesterday after booking an unrelated ticket. She replied that policy was as long as you both are on the flight, and are both using an upgrade instrument, it doesn't matter what the PNR situation is. When further asked about one on paid J, on the flight, upgrading another PNR in Y, she said if you ask when booking the paid J flight, they "try and do what they can to make exceptions." She implied that if you've already booked the paid J ticket and ask for a Y pax instrument upgrade it probably won't happen.