The trip took about 12 hours in total from 7 am in the morning to 7pm in the evening. The tour operator assigned a guide and a bus which took me first to Oia and then to Fira. The stop at Oia was for about 1 hour and that at Fira was about 2.5 hours. An optional boat ride to Nia Kameni hot springs cost twenty euros and included a 1 hour visit to the Nia Kameni cove and swimming in the yellow hot springs for about 10 minutes. Overall, if you ignore the crowd, it was a quick but enjoyable one-day trip to these three places. A steep climb from the port, winding narrow roads, tourist centric white+blue structures, cliffs overlooking the Santorini caldera, pristine blue sea and lovelorn couples are a few of the many things to look for. I would rather stay there a few more days to get a better feel of the place. The cost of this experience was high however, because the tickets to the ferry came to only thirty euros. The rest of the fee was for the bus ride, the tour guide and the operator.

This is a great day trip from Crete. If you’re short on time to explore I would definitely suggest this. Santorini is extremely crowded and this is the perfect way to get a quick dose of it. Our guise Elena was so kind and knowledgeable. I highly recommend booking this. We had an amazing time. But be prepared it is a very long day and there are A LOT of people. But worth it!

Well organized trip, but a really weird schedule - you get less time (only ~1h) in the more beautiful town - Oia and then 2hrs in Fira, which is nice but not as iconic. If I were to do it again I'd probably look to book the ferry myself so I'm not bound by the schedule.