Travelers can effortlessly update their flight ticket under United flight change policy. If they make the modification within 24 hours of booking, they do not have to pay any flight change fee. Furthermore, the airline gives you a future credit for the difference if the new air ticket is less costly than the previous one. To get more details regarding the policy, call 1-800-UNITED-1, United customer support number, or visit the official airlines website. Even if they are unavailable, dial the flight experts number 1-800-865-1848 for a quick response.