upgrade with lap child?
I am planning a trip of ORD-CUN with an infant. Will adding a lap child to my ticket impact my chance of upgrade (I am a Plat Pro)? Or shall I wait until the 72hr window before I add the infant ticket (upgrade or not)?
I checked ITA, and it looks like the 10% for this route is actually a $0 base + tax in both economy and business, so does that mean even if I get upgraded, the infant ticket won't see a price hike?
TIA.