We are planning on renting a car as we leave Porto at the train station and return it when we arrive in Lisbon. The question is where. When I have searched online there are multiple options. I am looking for easiest in terms of drop off but also to go into the city.
A separate question is about rental agencies. We have previously used local agencies in Greece and then rented through autoeurope in Sicily. Are there any local agencies that would allow pick up in Porto and return in Lisbon? Or do we need to stick to the international brands?