United Airlines Flight Cancellation policy is designed to offer its passengers the best of experiences.  Our 24 hours cancellation policy is the same for all categories. We offer a 24 hours window before charging you for the cancellation.If you want to skip the process and get someone else to do it on your behalf, just reach out to our customer support executives at +1 (877) 232-4253 (Contact number). All you need to do it is to ask them. They are well trained and will get your flight canceled in no minutes