 The Airport Express line runs for 22 @.@ 7 km ( 14 @.@ 1 mi ) from New Delhi Railway Station to Dwarka Sector 21 , linking the Indira Gandhi International Airport . The line was operated by Delhi Airport Metro Express Pvt. Limited ( <unk> ) , a subsidiary of Reliance Infrastructure , the concessionaire of the line till 30 June 2013 and is now being operated by DMRC . The line was constructed at a cost of ₹ 57 billion ( US $ 850 million ) , of which Reliance Infrastructure invested ₹ 28 @.@ 85 billion ( US $ 430 million ) and will pay fees on a revenue @-@ share model . The line has six stations ( <unk> Kuan and Delhi <unk> became operational on 15 August 2011 ) , with some featuring check @-@ in facilities , parking , and eateries . Rolling stock consists of six @-@ coach trains operating at intervals of ten minutes and having a maximum speed of 135 km / h ( 84 mph ) . Originally scheduled to open before the 2010 Commonwealth Games , the line failed to obtain the mandatory safety clearance , and was opened on 24 February 2011 , after a delay of around 5 months . After 16 months of commencement of operations , the line was shut down for repairs of the viaducts on 8 July 2012 . The line reopened on 22 January 2013 . On 27 June 2013 Reliance Infrastructure Ltd intimated 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 . In Jan 2015 , DMRC reported that Airport Metro has recorded about 30 per cent rise in its ridership following the fare reduction of up to 40 per cent in July last year On 14 September 2015 DMRC announced to reduce fares even further to improve the ridership of the line , the new fare structure will have maximum fare of Rs 60 and minimum of Rs 10 instead of Rs 100 and Rs 20 charged earlier , a reduction of about 40 % . DMRC has stated that this was done to reduce the crowding on Blue line , diverting some of the Dwarka @-@ bound passengers to Airport Express Line , which is underutilised and faster compared to the Blue Line . 
