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
John Welsh Dulles John Welsh Dulles John Welsh Dulles (November 4, 1823 – April; 13, 1887) was an American Presbyterian minister and author. He was the grandfather of John Foster Dulles and Allen Welsh Dulles. Dulles was born in Philadelphia, Pennsylvania, November 4, 1823, the son of Joseph Heatly Dulles and Margaret (Welsh) Dulles. He graduated from Yale College in 1844. After pursuing the study of medicine in the University of Pennsylvania in 1844 and 1845, he entered the Union Theological Seminary, New York City, in January, 1846, and completed the course there in 1848. On October 2, 1848, he was ordained by