A shipping system for shipping packages involving the coordinated use of at least a first carrier and a second carrier. The shipping system includes physical delivery facilities for the physical delivery of packages, the physical delivery facilities including at least one transfer location at which the second carrier may take over delivery responsibilities for a package. The shipping system also includes an information system having a shipper computer system configured to record and determine whether the delivery address of a package is an efficient destination for the first carrier. If not an efficient destination, such as a delivery address having a rural zip code, the shipper computer system is configured to label the package for delivery to one of the transfer locations, allowing the first carrier to transfer the selected package to the second carrier for completion of the less efficient portion of the delivery.