Starting May 4, Iowans can take nonstop flight from the Des Moines International Airport to Philadelphia, the airport announced today. The American Airlines route will be offered twice each day. “Currently, there are over 35,000 passengers a year traveling between DSM and PHL, and that market is growing,” said airport Executive Director Kevin Foley. With the latest news, American will offer nonstop flights to six cities. It is the largest airline operating in Des Moines.