United Airlines allows cancellations within 24 hours of booking for a full refund if the flight departs after seven days. For cancellations beyond this period, charges may vary depending on the ticket type. Basic Economy tickets are generally non-refundable. For refundable tickets, the process is easier, and no fee applies. Need help canceling or rebooking your flight? Visit United Airlines’ official website or reach out to their support team to understand your options and get personalized assistance.