https://www.devex.com/people/rescheduling-your-united-airlines-ticket-a-complete-guide-2214707
https://www.devex.com/people/how-to-easily-change-your-united-airlines-flight-date-2214796
https://www.devex.com/people/can-i-change-my-flight-on-united-airlines-everything-you-need-to-know-2214819
https://www.devex.com/people/how-to-modify-your-southwest-airlines-reservation-2218085
https://www.devex.com/people/how-to-reschedule-your-flight-on-southwest-airlines-2218116
https://www.devex.com/people/changing-flight-dates-with-southwest-airlines-what-you-should-know-2218214
https://www.devex.com/people/how-to-adjust-your-travel-date-on-southwest-airlines-2218245
https://www.devex.com/people/can-i-change-my-southwest-airlines-flight-date-without-fees-2218274