Need to cancel your United flight? United Airlines offers a free cancellation policy within 24 hours of booking, provided the flight is scheduled at least seven days in advance. After this window, cancellation fees may apply depending on your fare type. If your plans have changed, it’s best to review your ticket’s terms or reach out to United for personalized help. Ensure you’re aware of your options and take action swiftly to take advantage of any fee waivers available.