Taxi fares from the Santorini airport are 35€ to 40€ to Oia, 20€ to 30€ to Fira, and 25€ to 35€ to the ferry port, and 25€ to 35€ between Oia and Fira. Fares increase in the evening and again after midnight. By law, taxis in Greece are not allowed to carry more than four passengers at a time.