Five out of six lines of the Metro do Porto share a joint route between Estádio do Dragão and Senhora da Hora. This route runs from east via the centre to the north-west of the city over a distance of almost 10 km and has a total of 14 stations/stops: Estádio do Dragão – Campamhã – Heroismo – Campo 24 de Agosto – Bolhão – Trindade – Lapa – Carolina Michalis – Casa da Música – Francos – Ramalde – Viso – Sete Bicas – Senhora da Hora.

The lines B and E of the Metro do Porto share their route not only on the joint route, but also beyond Senhora da Hora until Verdes. On this section are from Senhora da Hora 5 stops until Verdes: Fonte do Cuco (also shared with line C) – Custóias – Esposade – Crestins – Verdes.

Line C is the successor of the narrow gauge railway to Trofa, though it reaches only until ISMAI. In Porto it uses the joint route and then for a short distance shares the tracks with the lines B and E. Line C diverts from line B in Fonte do Cuco, one stop north of Senhora da Hora. Between the stops Custió and Parque da Maia line C diverts from the original route of the narrow gauge railway to join it again at Mandim. This is done to serve better the centre of Maia. Counted from Fonte do Cuco the length is 10 km and there are 10 stops: Cândido dos Reis – Pias – Araújo – Custió – Parque da Maia – Fórum Maia – Zôna Industrial – Mandim – Castelo da Maia – ISMAI. The old narrow gauge railway had on this part four stations and three more on the part which is not realised.