Originally Posted by AviationFan
I have in the past been offered by Northwest reservations agents to cross-reference two PNRs. That's not the same as combining two bookings into one, but I was told that it provided protection from schedule changes that might affect the reservations in different ways. I generally ask for this whenever I have a trip with one purchased ticket and one award ticket, a scenario that requires two PNRs.
- Martin
It offers you no such protection.
Cross-referencing is merely a notation in the record that these two people are travelling together. No systems are looking at it, and neither are agents, unless they specifically look for it.