 Aeromexico has returned to Dulles with daily nonstop flights to Mexico City. Aeromexico pulled out of Dulles in 2019. Right now, United Airlines is the only other airline with nonstops to Mexico City from Dulles. Dulles Airport had a record 9.3 million international travelers last year, among the fastest growing airports for international travel. Tuesday, trading on Wall Street, the Dow's down 13%.