Default shore-day move
Santorini caldera day
This is the right move when the traveler wants the strongest postcard payoff and the day can support cable-car or tender friction without trying to stack too many villages.
Santorini works best when the day centers on one scenic payoff instead of forcing a full-island checklist through crowded transfer lanes.
Best in a 4 to 6 hour window with conservative return buffer for cable car or tender delays.
Stay closer to Fira-caldera flow unless Oia is clearly the point of the stop and the crowd cost is worth it.