To add an infant (under 2 years old) to a Delta Airlines booking, you can either do it online during booking or afterward by calling Delta Reservations. Infants traveling on an adult’s lap within the U.S. usually fly for free, but international routes may charge a small percentage of the adult fare or taxes. If you prefer a separate seat for the infant, you’ll need to purchase a child fare and use an FAA-approved car seat. Always notify Delta in advance to ensure proper seating and documentation.
