Need a flight cancellation with British Airways? If you booked a flight ticket and want to cancel for sudden or personal reasons, then British Airways offers a cancellation policy for flight ticket cancellations. If you cancel their reservations within 24 hours of booking, you get a full refund. And the booking was made at least 7 days before the flight departure date. You can learn about British Airways cancellation Policy by visiting the official website or contacting the customer number.