Originally Posted by
njsalazar
I’m looking to book a US domestic flight in May. I will have a lap infant but I won’t know the gender/name until it’s born in March. Can I book now and add the lap infant after the fact? Or do I need to book both at the same time? Do I need the name to book the lap infant? If not I guess I could just book the flight now with an unnamed lap infant.
I'm 99.5% sure you can add at any time. For a while it was asking at check-in if you had one, but haven't seen that recently. But yes, you need the name + gender/DOB.