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Three were new colour-coded lines and three routes connect to other cities of the national capital region, outside the physical limits of Delhi state, in the states of Haryana and Uttar Pradesh. At the end of Phases I and II, the cumulative total length of the network became 189.90 km with 151 stations progressively becoming operational from 4 June 2008 to 27 August 2011
| Line | Routes | Length | Current Status | |||
| #1 Red Line | Rithala – Shaheed Sthal | 34.55 km | Operational | |||
| #2 Yellow Line | Samaypur Badli – HUDA City Centre | 49.02 km | Operational | |||
| #3 Blue Line | Dwarka Sec 21 – Noida Electronic City | 56.11 km | Operational | |||
| #4 Blue Line | Yamuna Bank – Vaishali | 8.51 km | Operational | |||
| #5 Green Line | Mundka – Brigadier Hoshiyar Singh | 28.79 km | Operational | |||
| #6 Violet Line | Kashmere Gate – Raja Nahar Singh | 46.34 km | Operational | |||
| #7 Pink Line | Maujpur - Majlis Park – Shiv Vihar | 71.56 km | Op.-59.24 km, U/c-12.32 km | |||
| #8 Magenta Line | Janakpuri West – Botanical Garden | 66.72 km | Op.-37.46 km, U/c-29.26 km | |||
| #9 Grey Line | Dwarka – Najafgarh - Dhansha Bus Stand | 5.19 km | Op.-4.2 km, U/c-0.99 km | |||
| #10 Silver Line | Aerocity – Tughlakabad | 23.62 km | Under Construction | |||
| Orange Line (Airport Line) | New Delhi – Dwarka Sec 21 | 24.78 km | Op.-22.91 km, U/c-1.87 km | 
Click here to see station names, fare and route maps.
| Phase | Project Cost | Funding By | ||
| Phase-II | ₹18,783 Crore | Govt. of India, Govt. of Delhiand JICA | 
NA
• 04 Jun 2008: 3.1 km section between Shahdara – Dilshad Garden on Red Line opened.
• 04 Feb 2009: 6.4 km section between Vishwa Vidyalaya – Jahangirpuri on Yellow Line opened.
• 10 May 2009: 2.1 km section between Indraprastha – Yamuna Bank on Blue Line opened.
• 13 Nov 2009: 13.1 km section between Yamuna Bank – Noida City Centre on Blue Line opened.
• 08 Jan 2010: 6.3 km section between Yamuna Bank – Anand Vihar on Blue Line opened.
• 03 Apr 2010: 15.1 km section between Inderlok – Mundka on Green Line opened.
• 21 June 2010: 14.5 km section between Qutub Minar – Huda City Centre on Yellow Line opened.
• 03 Sept 2010: 12.5 km section between Central Secretariat – Qutub Minar on Yellow Line opened. 
• 03 Oct 2010: 15 km section between Central Secretariat – Sarita Vihar on Violet Line opened.
• 30 Oct 2010: 2.8 km section between Dwarka Sector 9 – Dwarka Sector 21 on Blue Line opened.
• 14 Jan 2011: 5.1 km section between Sarita Vihar – Badarpur on  Violet Line opened.
• 23 Feb 2011: 22.5 km section between New Delhi Railway Station – Dwarka Sec 21 on Airport Express Line opened.
• 14 July 2011: 2.6 km section between Anand Vihar – Vaishali on Blue Line opened.
• 27 Aug 2011: 3.3 km section between Kirti Nagar – Ashok Park Main on Green Line opened.