If I am traveling with my 5 month old baby on a domestic flight does she need a passport? If not, what do I use for her ID, her birth certificate?
I just took shot records.
You can either do shot records or birth certificate. Call the specific airline you are flying just to verify. I was freaking out when we flew with DS around 3 months b/c I hadn't gotten his BC, yet - but SWA just said to bring the shot records.
I would definitely bring whatever documention they say, though. Even if they are obviously under 2 y/o, you never know when they decide that the lack of documentation is enough for you to have to purchase a ticket.