Children traveling with adults on domestic flights may not need a photo ID card; however, airlines may require the accompanying adult to show proof of age in the form of a birth certificate. You’ll need to check with the airline on which you’ve booked travel for their specific rules regarding child airport identification. Children, even infants traveling internationally will be subject to the same documentation requirements as adults. This means that if you are planning an international trip, even if a baby has not yet been born but will be born by flight time, you will need to make arrangements for a passport.
When a child is traveling as an unaccompanied minor, the adult dropping the child at the airport as well as the adult picking the child up at his or her destination will be required to show identification. Additionally, the airline will need to be notified in advance with the contact details of the adult retrieving the child at the final destination.
While airlines may not specifically require children to travel with individual photo identification, it is never a bad idea to have photo ID created for your child before you travel. Sites such as kidstravelcard.com will make photo IDs for children that include a parent’s name and emergency contact numbers in case you should become separated from your child.