United Airlines offers a 24-hour flexible booking policy where you can cancel your flight for a full refund to the original payment method if done within 24 hours of booking, provided the booking was made at least one week before departure. 🕒 After the 24-hour window, cancellation policies vary depending on the ticket type, with Basic Economy tickets often not eligible for refunds but potentially offering travel credits. Most other tickets are nonrefundable, but the value can often be applied as a travel credit for future flights under United’s ticket change guidelines.