https://www.devex.com/people/what-is-the-cost-for-a-lap-infant-on-american-airlines-2390799
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/does-united-offer-discounts-for-infants-or-children-2391316
https://www.devex.com/people/at-what-age-is-a-child-considered-an-infant-on-delta-airlines-2391825