Washington Dulles International Airport is in Dulles, Va., 25 miles west of the nation’s capital. In 2011, the airport served over 23 million passengers, according to the Metropolitan Washington Airports Authority, but 21.39 percent of the flights arrived later than they were supposed to, making connections needlessly stressful, while 20.19 percent of flights experienced delayed departures, leading to lots of huffing and fuming in the waiting area.