Delta infant policy flexible and friendly infant policy. Infants under the age of two travel free on adult laps on domestic flights; foreign flights have a subsidized cost. If a parent wants their baby to sit on their own, they can buy a ticket and utilize a kid safety seat that has been approved. Furthermore, bassinets are available on some foreign flights operated by Delta; reservations are required, and they are filled on a first-come, first-served basis. Families with young children can take advantage of priority boarding on Delta flights, which gives them more time to settle in. This extensive policy demonstrates Delta's dedication to providing families with small children with convenient and enjoyable air travel.