When I booked my Delta flight for a family trip, I completely forgot to add my baby to the reservation. I panicked at first, but it turned out to be super easy to fix. I just called 877-297-0699, and the Delta representative added my infant in minutes. They explained that infants under two can fly on your lap for a small fee (or sometimes free on domestic flights). I even got help choosing seats that made it easier to travel with a baby. If you’re traveling soon, I’d recommend calling 877-297-0699 directly — it’s the fastest way to get everything sorted without stress.