Sharing a little gem I discovered. Company called Taxi2Spain (www.Taxi2Spain.com) where you can book taxis/large vans for your destinations.
We stayed in an Air BnB and it was so nice to have a taxi waiting for us at the correct time right outside our apartment to take us to the airport. No dragging luggage looking for a taxi or schlepping on a train to airport.
You book and pay online in advance (has to be over 24 hrs from date of travel). Highly recommend.