Organised day tours to Aspendos are widely available from Antalya, Belek, and Side, and they solve the transport problem effectively. The trade-off is a fixed timetable — you board when the tour departs, visit according to the guide's schedule, and return when the group is ready. For those who want to be at the theatre gates at 08:00 before the heat builds, or who wish to linger at the aqueducts without watching a clock, the group tour format works against you.
A private transfer gives you door-to-door service on your terms. Departure is at the time you choose, the vehicle goes directly to Aspendos without collecting other passengers from multiple hotels, and your driver waits at the site for the full two hours. If you decide to extend your visit — during an opera festival evening, for example — that is straightforward to arrange. There are no other group members to consider and no coach timetable to keep.
Private transfers are particularly well suited to families with young children, travellers combining Aspendos with another site on the same day, and anyone arriving from Belek or Side who wants a direct 20–35 minute journey rather than a shared coach that sweeps through multiple resort hotels first. The all-in fixed price, confirmed before departure, also removes the ambiguity that comes with negotiating local taxis onward from Serik.