https://www.devex.com/people/what-is-american-s-policy-for-twins-or-multiple-infants-2391027
https://www.devex.com/people/how-do-i-add-an-infant-to-my-american-flight-reservation-2391040
https://www.devex.com/people/how-to-add-an-infant-to-your-alaska-airlines-economy-class-booking-2390716
https://www.devex.com/people/do-babies-under-2-fly-free-in-first-class-on-alaska-airlines-2390668
https://www.devex.com/people/how-to-handle-name-changes-on-united-like-a-pro-2389312