To change your flight with United Airlines, call 1-888-356-5330. United Airlines offers flexibility in changing flights depending on your fare class. For «Basic Economy,» changes are generally not allowed, while «Economy» and higher fares permit changes with a fee. Some fare types even allow free changes. You can manage your booking online or by calling customer service at 1-888-356-5330. Make sure to check for any fare differences and review the “United Airlines change flight” policy for specific details. For assistance, dial 1-888-356-5330 and modify your flight smoothly with United Airlines.