The Airport Express Line or Orange Line is a Delhi Metro line from New Delhi to Yashobhoomi Dwarka Sector - 25, linking Indira Gandhi International Airport. The total length of the line is 22.7 km (14.1 mi), of which 15.7 km (9.8 mi) is underground and 7.0 km (4.3 mi), from Buddha Jayanti Park to Mahipalpur, elevated.

The Dwarka Sector 21 metro station, on the Blue Line and Orange Line of the Delhi Metro, is a major metro and multimodal interchange station with adjacent Dwarka ISBT Bus Terminal in the west and Bijwasan railway station in the east.