I recently did the Oia on your Own excursion on NCL. It involved being tendered to the Athinios port in Santorini from which we took a coach up the mountain to Oia. I have some mobility issues and did find this tour a bit challenging. There was no trouble boarding the coach, which occurs in a flat parking lot in Athinios. However, the coach leaves you in a parking lot about a 10 minute walk outside the town of Oia and you have to go up an incline and some steep steps to get into town. The tour guide took us into town at a fast pace which I found difficult to manage on the stairs. Once in town there are a lot of inclines, steps and crooked cobblestones, but you are left on your own and can take your time and explore as much or as little as you want. Oia was packed with so many people that it was difficult to move at times, so it was definitely not as enjoyable as expected, even though the views are wonderful. After visiting Oia for about 90 minutes we had to return to the coach parking lot where they drove us to the town of Fira. We were given tram tickets and left by the guide on a street that was about a 10 to 15 minute walk from the place where you take the tram. The guide did not take us to the tram but gave us directions to find it ourselves. Again, the walk to the centre of Fira was uphill, with steps, inclines and uneven cobblestones. It was challenging for me. Then we had to wait in line for over an hour to take the tram down the mountain to the tender boats. I found the trip to Santorini to be not particularly enjoyable due to the crowds and exhaustion from all of the steps, inclines etc.
