Well, United Airlines allows passengers to change flights up to 24 hours before their scheduled departure time, for free and with no penalties. After the 24-hour period, United Airlines Change Fees will be $200 to change the date and time of their flights. If you need to change your flight with United Airlines, understanding their change fee structure is essential. Here’s a breakdown... https://www.crmportalconnector.com/developer-network/forums/general-discussions/united-airlines-change-fee-information-(contact-888-829-1467)