Southwest Airlines has long been known for its operational efficiency, which is a cornerstone of its business model. However, at Denver International Airport (DIA), the airline faces unique challenges that affect this efficiency. Some Southwest flights arriving in Denver do not depart from the same concourse, creating logistical hurdles.
Denver International Airport's layout necessitates that international flights arrive at Concourse A to allow passengers to pass through U.S. customs immediately upon disembarking. "Passengers on almost any international flight arriving in Denver are required to pass through US customs," making it essential for these flights to dock at gates connected to customs facilities.
Concourse A's proximity to the main terminal facilitates this process. However, Southwest primarily operates out of Concourse C, located at the opposite end of the airport. This means aircraft must be towed across DIA for their next departures, impacting turnaround times and increasing operational costs.