					Aeropuerto T4
					Cercanías lines C-1, C-10
					Barajas
					Aeropuerto T1-T2-T3
					Corralejos (proposed)
					Line 5 (proposed)
					Feria de Madrid
					Mar de Cristal (Line 4)
					Pinar del Rey
					Colombia (Line 9)

					Madrid–León line
					Line 10
					Nuevos Ministerios (Line 5^{[citation needed]})

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Line map

Line 8 of the Madrid Metro opened between Mar de Cristal and Campo de las Naciones (now Feria de Madrid) on 24 June 1998. An extension to Barajas via Madrid Airport was opened in 1999 and in 2002 an extension to Nuevos Ministerios and Colombia opened. Originally this line was a small-profile line, but in 2002 it became a large rolling stock line. The line uses 4-car versions of class 8000 trains. In 2007 an intermediate station called Pinar del Rey opened between Colombia and Mar de Cristal, as did an extension to the new Terminal 4 of Madrid Airport.

The line was temporarily closed for renovation from 26 January to 12 April 2017.

The old Line 8[edit]

Route map of old line 8

As part of network extension plans in the 1970s, the construction of a north–south line along the Castellana-Recoletos-Prado axis originating in Fuencarral and headed toward Madrid Atocha and further to the south was initiated. The southern stretch toward Carabanchel is now the current Line 11. From this project the construction of the section between Fuencarral and Nuevos Ministerios which opened on 9 June 1982 on the occasion of the celebration of the World Cup in Spain began, as the line gave service to Santiago Bernabeu Stadium.

Given the economic difficulties of the Metro in the 70s and 80s, the rest of the project from the original Line 8 was discarded, and instead only tunnel that connected via line 8 to line 7 is enabled. This way, on Tuesday 23 December 1986, the extension of line 8 from Nuevos Ministerios and Americas Avenue was opened.

The project developed between 1995 and 1998 to merge lines 8 and 10 by building a tunnel between Alonso Martínez and Nuevos Ministerios, left down the stretch Nuevos Ministerios - Avenida de America. Subsequently, on 10 December 1996 the tunnel was opened, after which the line 8 disappeared to lease its infrastructure to line 10. To make this possible, it was necessary to install the platforms projections because, since then, the stretch began to exploit narrow gauge trains.

Stations[edit]

Station	Opened	Zone	Connections
Aeropuerto T4	2007	A	Cercanías Madrid:
Barajas	1999	A
Aeropuerto T1-T2-T3	1999	A
Feria de Madrid	1998	A
Mar de Cristal	1998	A	Madrid Metro:
Pinar del Rey	2007	A
Colombia	2002	A	Madrid Metro:
Nuevos Ministerios	2002	A	Madrid Metro: Cercanías Madrid:

Future of Line 8[edit]

Plans exist to extend Line 8 in the future beyond Nuevos Ministerios. Projected stops are:

Station	Connections
Gregorio Marañón
Rubén Darío
Colón
Recoletos
Banco de España
Prado
Atocha	, future
Mendez Alvaro

Key:

Madrid Metro lines
Renfe suburban services
Renfe intercity services

A date for this extension has not yet been given, as it is only in the planning stage.^[1] An additional station called Corralejos is planned to be built between Feria de Madrid and Aeropuerto T1-T2-T3, where transfer to the planned line 5 extension will be made.