This document describes techniques and user interfaces that enable efficient selection of routes for private segments. In one aspect, a method includes receiving data indicating one or more textual characters entered into a text entry field of a user interface presented by a computing device. In response to receiving the data indicating the one or more textual characters, a selection if made of one or more airport groups based at least in part on the one or more textual characters entered into the text entry field of the user interface. Each airport group includes a respective subset of a set of airports selected for the airport group based at least in part on historical data for previous client-initiated segments to and from airports in the set of airports. The user interface is updated to present data identifying each of the one or more selected airport groups.