United ???????????????????????????????? 24-Hours cancellation policy allows you to cancel or change your flight booking within 24-Hours of purchase without incurring any fees +1--86.6-8.84-3315 [????????????] ???????? +1-86,6-884-3,31,5 [????????????] ???????? ++44-800/208/1075 [????????] {United ????????????????????????????????-Man}.This applies to all flight bookings made through United ????????????????????????????????, provided the cancellation or change is made at least seven days before the scheduled departure.