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The Delhi Airport Express Line or Orange Line is a Delhi Metro line from New Delhi Metro Station to Dwarka Sector 21, linking Indira Gandhi International Airport. The total length of the line is 22.7 km, of which 15.7 km is underground and 7 km, from Buddha Jayanti Park to Mahipalpur, is elevated. On 27 June 2013 Reliance Infrastructure Ltd. announced to DMRC that they are unable to operate the line beyond 30 June 2013. Following this, DMRC took over operations of Airport Express line from 1 July 2013 with an operations and maintenance team of 100 officials to handle the line. The line runs at a speed of 80 km/h providing for a 19-minute journey from New Delhi to IGI Airport. From Wikipedia