In conclusion all three companies offer a very similar service and tourist should be on the look out for internet offers or local offers before as on board prices will always be more expensive. One of the main consideration is choosing to join a tour bus is the price of a ticket which is very expensive when compared to the cheap price of public transport in Lisbon. The main hub and start of all the tours is at Praça do Marquês de Pombal (top of Avenida da Liberdade) on the Yellow metro line. This is the easiest location to join each of the tours especially for Grayline and City Sightseeing as their main stops in Baixa are not very obvious. At Marquis of Pombal there are always tour buses waiting.
