Do you have concerns with United Airlines' fees for flight changes? Well, United Airlines doesn't charge a fee and lets customers switch flights up to 24 hours prior to the original departure time. United Airlines change fees for changing the date and time of its flights are $200 after the initial 24-hour window. There won't be a United change flight fee if your plan includes travel within the United States and Canada. Basic Economy fare is exempt from this. If you fly earlier on the same day, the standby fee is no longer charged.
https://airlinespolicy.com/fli....ght-change-policy/un