You want to get out of town, but first you have to catch your flight. Be warned: Driving to each of the Washington region’s airports takes longer than it did eight years ago, thanks to everyone’s favorite passenger: road congestion. A study by the National Capital Region Transportation Planning Board examined travel times from more than 15 residential or business hubs in the area to each of the region’s major airports: Washington Dulles International, Ronald Reagan Washington National and Baltimore/Washington International Thurgood Marshall. Highway travel times during peak times on weekdays increased since 2003 in most cases.