Originally Posted by
Tulane41
Domestic is a totally different ballgame (fortunately). Either paid or award most agents know how to do it over the phone, and you can actually just wait and do it at check-in at the airport if, like me, you're concerned that it may mess with your CPU if you do it earlier.
Having an infant on the booking seems to have zero impact on CPUs (same on CO in the past with EUAs). My wife (1K) has been upgraded in advance on all of her 15+ flights with our baby on the booking.