From Lisbon to Lagos, the most convenient way to get there is by train: every 4 hours in the right direction, the Portuguese Railways trains along the Intercity line. For two and a half hours you will reach Tunes, from where only in an hour on the line Regional (it will be necessary to make a transfer) - to Lagos. The whole trip takes about 3, 5 hours and about 30 EUR - 25 to Tunes and 4 EUR to Lagos.

By bus to Lagos, you can get by using the services of bus carriers Rede Expressos or EVA Transportes, the ticket price is about 30 EUR, the travel time - 4 hours

And, of course, there is a great option with car rental, and in Portugal quite acceptable rental prices: starting from 10 EUR, on average about 25 - 30 EUR per day