Porto Airport ( OPO ) Public Transportation

From Porto Airport to your destination:  Taxis (tel. +351 22 5353350) charge their fare by taxi meter (weekend have a higher fare).
The Airport budget shuttle to city center: tel. +351 252 116 701, e-mail: info@100rumos.com; or visit: 100rumos.com.
'Goin' Porto shuttle: between Airport and Avenida dos Aliad's south end. 

By Train:
The New light Rail system to the City now serves the Airport. Note, however, that tickets are only available at the Airport's ticket machines, for instructions on how to use them, open their website  (in English) below.
The City's Metro 
has six lines which are marked by leters & colors: A blue; B red, C green, D yellow, E purple & F orange, and the majority of lines reach Porto's most popular sights.  the 'Porto Card' offers access to metro, buses & funiculars for a set time period.  Porto cards offer free or discounted entry to some museums and discounts to restaurants.  You may also opt for a rechargeable blue Andante card when using e Metro - open: www.metrodoporto.pt/en/
    Metro's Line E (purple)
  (open site: www.metrodoporto.pt/en) takes you to the following city stops, including railway stations (with high-speed trains at Estádio do Dragao station) Casa da Musica, Trindade Station, Campanha Station, and Dragao Stadium; the trip takes 23 to 35 minutes. (Stops nearest city center are Lapa, Trindade & Bolhao.
Train Transfers to other urban centers:
- at Verdes station to Vila do Conde and Póvoa de Varzim (using line B),
- at Fonte do Cuco station to Maia (line C),
- at Senhora da Hora station to Matosinhos (line A),
- at Trindade station to V.N.Gaia (line D),
- at Estádio do Dragão to Rio Tinto/Fânzeres (line F).

By Bus:
    STCP Bus Lines (open: www.stcp.pt):
Line 601 to Cordoaria,
Line 602 via Padrao Moreira to Cordoaria,
Line 604 via Maia to Sao Joao Hospital
Line 3M to Av. dos Aliados
    Resende Bus Line (open: www.urbanosresende.net):
Line 120 to Guifoes, and
Line 105N to Sao Gens.
    The Vigo Bus  (open: www.autna.com or call +351 251 821043 or e-mail: comercial@autna.com) has four daily departures from the Airport to Vigo, Spain. It also serves the Valenca bus station on weekdays.