Try a dawn journey to beat the crowds, watch pale spill over the caldera
https://atomic-wiki.win/index.php/Santorini_Tour_Prices_Explained:_What%E2%80%99s_Included_and_What%E2%80%99s_Not
Try a sunrise journey to beat the crowds, watch gentle spill over the caldera, and catch serene streets prior to the island wakes up.