https://www.devex.com/people/does-united-allow-infants-to-fly-for-free-2204127
https://www.devex.com/people/at-what-age-is-a-child-considered-an-infant-on-united-airlines-2204213
https://www.devex.com/people/do-infants-need-a-ticket-to-fly-on-united-2204338
https://www.devex.com/people/can-an-infant-travel-without-a-birth-certificate-on-united-airlines-2204423
https://www.devex.com/people/can-i-hold-my-baby-on-my-lap-during-the-flight-on-united-2204524