Group tours that include Olympos are widely sold from Antalya, Kemer, and Belek, and they do the job of getting you there and back. The trade-off is structural: you share the day with a coachload of other visitors, you arrive and depart on the operator's fixed schedule, and your time at the ruins is predetermined — typically around 90 minutes before the group moves on to the next stop on the itinerary. For a site as spread-out and rewarding as Olympos, where the ruins run the full length of a river valley and spill onto a beach, that constraint is a real one.
A private transfer to Olympos changes the dynamic entirely. You leave from your hotel at the time that suits you, you have the vehicle and driver exclusively, and the standard 2-hour wait is built into the price. If you want to extend your visit to include the beach below the ruins or arrange an evening trip to the nearby Chimaera flames, additional waiting time is flexible and can be booked when you confirm your transfer. There are no other passengers to coordinate with and no itinerary you did not choose.
Private transfer makes most sense for couples, families with children, and anyone who values time at the site over a packaged day out. It is also the clear choice for travellers staying in Kemer, where the journey to Olympos is only around 35 km — short enough that a tour operator's full-day format represents poor value compared with a straightforward direct transfer.