  Improving the passenger air travel experience is one of the explicit goals
set by the Next Generation Air Transportation System in the United States and
by the Advisory Council for Aeronautics Research in Europe FlightPath 2050.
Both suggest door-to-door travel times as a potential metric for these
objectives. In this paper, we propose a data-driven model to estimate
door-to-door travel times and compare the reach and performance of different
access modes to a city, as well as conduct segment analysis of full
door-to-door trips. This model can also be used to compare cities with respect
to the integration of their airport within their road structure. We showcase
multiple applications of this full door-to-door travel time model to
demonstrate how the model can be used to locate where progress can be made.
