https://community.expensify.com/discussion/35205/1-888-829-1467-can...
Yes, you can change your flight without penalty on United Airlines, and it offers more flexibility when you change your flight within 24 hours of the booking. Further, if you have booked your flight ticket within one week in advance and want to change your flight date and time, you can reschedule your flight without paying any charges. But if you have to pay the difference in the charges, that depends on the fare type, destination, and booking date. Apart from this, when your flight is delayed and is expected to be canceled