This facility will let you take the necessary steps at the right time. Usually, in cases like that, United Airlines tries to get you on to the very next flight to your destination. You can also rebook your flight or change your flight if you want. The travelers just need to dial the United Airlines official phone number +1-866-901-7017 (OTA). The customer service team will do their best to help you. To know more about ‘how far in advance does united cancel flights’ read this blog.