United    ’s 24-hour rule allows passengers to cancel or modify their booking by calling +1-888-810-2224 or +1 +1-888-810-2224 (UK)within 24 hours of purchase with only minimal charges depending on the fare type. This flexible policy applies to tickets booked directly through United    ’s website, mobile app, or by contacting customer service at+1-888-810-2224 or +1 +1-888-810-2224 (UK). If you have just booked a United    and need to make changes, corrections.

Before participating in this event, you must complete and sign the required document below.