Getting There & Away
Buses from Alter do Chão to Santarém (R$3.50, one hour) depart hourly from the bus station 5:30am to 11pm, except on Sunday, when services end around 6pm. Catch the bus a block up from Praça 7 de Setembro, at the corner of Rua Dom Macedo Costa and Travessa Antônio A Lobato. If arriving in Santarém on the bus, there's a handy stop along Rua Dom Macedo Costa, which means a shorter walk down into town.
There is no bus to the Santarém airport from Alter do Chão, unfortunately. It's possible to take the bus as far as the airport turnoff, and wait for the airport bus from Santarém to pass, usually within 30 to 60 minutes. Otherwise, a taxi to the airport (or to Santarém or the riverboat ports) costs a painful R$100.