The Orange Line is a 37-mile (60 km) light rail line in the Dallas, Texas metropolitan area. The line is operated by Dallas Area Rapid Transit as a part of its DART light rail system. It is the only east-west line in the system.
The line runs from Dallas Fort Worth International Airport to northeastern Dallas, passing through Irving's Las Colinas neighborhood and Downtown Dallas in the interim. During weekday peak periods, the eastern segment of the line is extended further north to Richardson and Plano.