*All Boston Premier Car Service rates are estimated based on standard transfer time and subject to change without notice. All fares are subject to a 20% driver gratuity, applicable tolls, airport fees, and any waiting time. Charges will be calculated upon completion of the trip. To avoid a cancellation fee (equal to the full fare), all reservations must be canceled at least 12 hours before the scheduled pickup time. The payment will be processed on the day of the trip. Failure to provide valid payment information or flight arrival, will result a cancellation of the reservation.