Lisbon Airport (LIS), the principal facility serving the Portuguese capital, has slowly become one of the most important gateways between North America and Europe. Geography does a lot of heavy lifting, with the facility sitting on the western edge of the European continent. This allows Portugal to offer some of the shortest US-Europe flying times. These shave hours off itineraries that would otherwise require routing through more inconveniently located hubs like London, Paris, or Frankfurt. Once we add in the Portuguese tourism boom, relatively affordable prices, and year-round mild weather, the airport has quickly become a key player in the transatlantic market, which has only continued to expand in capacity.