Delta Airlines Infant Travel Policy outlines the guidelines and provisions for traveling with infants on Delta flights. Delta understands that traveling with young children requires careful planning and offers a range of services and policies to make the journey as smooth as possible. According to the Delta Airlines Infant Travel Policy, infants under the age of two can travel for free on a parent or guardian’s lap. However, each paying adult passenger can only travel with one infant on their lap. If you wish for your infant to have their seat, a discounted fare for children under two is available, and parents or guardians can use a FAA-approved child restraint device or car seat for safety.
https://airlinescityoffice.com/blog/delta-infant-policy-travel-safe-and-secure/