If your plan changes, don't be nervous. Cancel at least 24 hours before the event and you will get a full refund. Even if you have registered, you can cancel your reservation as long as it is more than 48 hours before the flight. If you have visited your reservation, but there is no "cancel reservation" option available, it may be due to 2 reasons: the reservation was not made directly through Vueling or its app. Remember, if the reservation is made through an agency or another website, you must manage your reservation through them. Less than 48 hours before your flight departure.