This analysis examined the effect of flight distance on greenhouse gas emissions per passenger, and compared emissions from flying different distances with annual emissions from driving. Greenhouse gas emissions were examined for 17 nonstop flights with round-trip distances ranging from 131 miles to 19,040 miles. Among these flights were the three most frequently flown routes in the United Sates (New York to Los Angeles, Los Angeles to San Francisco, and Chicago to New York); the shortest flight that is code shared with a major U.S. airline (San Francisco to Santa Rosa); the longest flight within the continental United States (Seattle to Miami); and the longest flight in the world (New York to Singapore). Average greenhouse gas emissions (carbon dioxide equivalent) per passenger from flying were obtained from an online emissions calculator at myclimate (a nonprofit spin-off from the Swiss Federal Institute of Technology). The myclimate estimates include not only […]