United Airlines gives wonderful online services. So if you want to cancel your United Airlines flight, you don't have to worry about much. United Airlines offers flights to several locations. United Airlines ’ customer service team is really helpful. They will also help you to cancel your reservation and gives you a flight ticket refund if you don't want to do it online. Passengers simply need to call United Airlines' authorized phone number +1-866-901-7017. The customer service team will do their best to assist you. For more info Also, Read our blog on How to get a refund on a United flight.