City pair City pair In commercial aviation, a city pair is defined as a pair of departure (origin) and arrival (destination) airport codes on a flight itinerary. A given city pair may be a single non-stop flight segment, a direct flight with one or more stops, or an itinerary with connecting flights (multiple segments). The city pair, IAD-LHR would consist of flights and/or multi-leg itineraries that originate at Washington-Dulles airport and terminate at London-Heathrow airport. The city pair, NYC-TYO would consist of flights and/or multi-leg itineraries that originate at any New York airport (New York-JFK, Newark-Liberty or New York-LaGuardia) and terminate at
London City Airport year could be absorbed by other airports which are currently under capacity. However, this plan was proposed when London City Airport was for sale. In February 2016 the airport was bought by a Canadian-led consortium, making redevelopment less likely. Additionally, the political weight behind air space in the south east would make it less likely still, with the government having approved the controversial expansion of Heathrow Airport, including the third runway. Owing to its proximity to London's Docklands and financial district its main users are business travellers, but the number of leisure destinations served (like Palma de Mallorca, Malaga or