If you want to change or manage your Delta Air Flight reservations, then within 24 hours of your departure, you can. To make changes, you need to visit the Manage My Booking option on the website. All they need to do is visit the manage my booking section on the website or contact customer care to get assistance regarding their query or modification.    

You can cancel or change an Allegiant flight without a fee if you booked it in the past 24 hours. Also, the flight should not be less than 7 days away. Here is how you will be charged if this window is unavailable under different scenarios.    

Passengers can request Southwest LUV vouchers for delays. But to be eligible for a Southwest LUV voucher, the airline must have changed a scheduled flight within 8 days of departure. Also, you must arrive at your destination 3 or more hours later. Here are the steps you can follow to get Southwest flight delay compensation.