Benchmarked strictly across TripTiming's 5 empirical pillars: Crowds, Weather, Vibes, Prices, and Safety.
Mykonos emerges as the optimal October destination with an overall TripTiming Index of 76/100 vs 74/100 for Santorini (+2 point advantage). Mykonos experiences more manageable visitor density and shorter landmark queues (carrying capacity score 69/100 vs 63/100 in Santorini). This is reinforced by lower lodging rates (~$245/night vs ~$286/night, saving ~$287 over 7 nights).