Originally Posted by
EvilDoctorK
Exactly that .. you have it right... make a booking for the 2 adults and when infant turns up with a DoB and a name then you can add them .. simple enough, though always wise to checkin early after having done this as in my experience sometimes it can get a bit messy when they do this with a booking ( but with an infant you'll be turning up early anyway probably ! )
Agree with this, and always bring the paperwork with the eticket number on it. I had three international itineraries like this, with three separate airlines (BA, NZ, QF) and the check-in agent couldn't see the infant booking at any of them, until I produced the eticket.