> In Athens, Greece, a 15 minute ride to the airport in 45 euros
This seems very different from my experience in Athens two weeks ago. According to Google maps, getting from the city to the airport by car takes around 40 minutes by car and the alternative of taking the train costs 10 euros per person for the same amount of time. Paying around 40 euros seems reasonable for such a long trip if you have more than one person.