https://www.devex.com/people/does-it-possible-to-extend-the-united-flight-s-2416848
https://www.devex.com/people/southwest-date-change-policy-everything-you-need-to-know-2417446
https://www.devex.com/people/clear-and-easy-name-change-policies-for-klm-airlines-flights-2415493
https://www.devex.com/people/how-to-change-the-date-on-your-united-airlines-flight-ticket-2414751
https://www.devex.com/people/how-to-correct-the-date-and-time-on-frontier-reservation-2416300