https://us.community.sony.com/s/question/0D5Dp00002AROcwKAH/primmumpolicy29147-what-is-united-cancellation-policy247-available
This applies to all flight bookings made through United 𝒜𝒾𝓇𝓁𝒾𝓃𝑒𝓈, provided the cancellation or change is made at least seven days before the scheduled departure.
United 𝒜𝒾𝓇𝓁𝒾𝓃𝑒𝓈' cancellation policy is customer-friendly. Tickets are fully refundable within 24-Hours of booking, provided the departure is more than two days ahead.
