 The Blue Line was the third line of the Metro to be opened , and the first to connect areas outside Delhi . Mainly elevated and partly underground , it connects Dwarka Sub City in the west with the satellite city of Noida in the east , covering a distance of 47 @.@ 4 kilometres ( 29 @.@ 5 mi ) . The first section of this line between Dwarka and Barakhamba Road was inaugurated on 1 January 2006 , and subsequent sections opened between Dwarka – Dwarka Sector 9 on 1 April 2006 , Barakhamba Road – Indraprastha on 11 November 2006 , Indraprastha – Yamuna Bank on 10 May 2009 , Yamuna Bank – Noida City Centre on 12 November 2009 , and Dwarka Sector 9 – Dwarka Sector 21 on 30 October 2010 . This line crosses the Yamuna River between Indraprastha and Yamuna Bank stations , and has India 's second <unk> bridge across the Northern Railways mainlines near Pragati Maidan . A branch of the Blue line , inaugurated on 8 January 2010 , takes off from Yamuna Bank station and runs for 6 @.@ 25 kilometres ( 3 @.@ 88 mi ) up to Anand Vihar in east Delhi . It was further extended up to Vaishali which was opened to public on 14 July 2011 . A small stretch of 2 @.@ 76 kilometres ( 1 @.@ 71 mi ) from Dwarka Sector 9 to Dwarka Sector 21 was inaugurated on 30 October 2010 . Interchanges are available with the Yellow Line at Rajiv Chowk station , Green line at Kirti Nagar , Violet line at Mandi House , Airport Express ( Orange ) line at Dwarka Sector 21 and with the Indian Railways network and Interstate Bus Station ( ISBT ) at Anand Vihar station , which connects with Anand Vihar Railway Terminal and Anand Vihar ISBT . 
