Measuring the Performance of City Pairs
City pairs refer to the origin and destination cities of flights and are significant for how airlines plan their service. The majority of city pairs for which metrics are reported on the NPS website were identified by the NextGen Advisory Committee (NAC). For most city pairs, data is available for fiscal years 2009-2013.
City pair metrics provide important information to air traffic controllers, airports and airlines that help them plan schedules and anticipate traffic levels. Understanding and tracking the time variation for city pair operations can lead to improved traffic flow management and flight scheduling, as well as reduced fuel consumption and emissions.
Performance metrics are sorted by city pairs grouped by metroplex — complex, high- traffic areas of metropolitan airspace that can include several major and reliever airports. The NPS city pairs operate out of the Core 30 Airports, which are airports that have an overall significance to the national airspace system based on air traffic operations and passenger boarding's.
Included in the city pairs performance metrics are the predictability and efficiency key performance areas, which analyze the annual performance for flights between a city pair operating in the direction indicated. The Effective Gate-to-Gate Time metric measures the average time between the scheduled gate departure and actual gate arrival at the destination. The Airborne Time Predictability metric measures the predictability of time elapsed from takeoff to landing for a selected city pair. Determining city pair gate-to-gate performance times can help airlines decide the most efficient way to connect markets.