According to British Airways' same-day flight change service, passengers can only make changes on the day of travel and all adjustments must be made at least one hour before scheduled departure. The new flight must follow the same route and connect to the same airports as the original ticket. If a passenger has checked in using one of the methods, they will not be able to choose a previous flight (online, mobile app, offline). British Airways does not offer same-day flight changes for long-haul flights; passengers will be charged a fee for any changes as well as the difference in flight fares.