Getting to Ancient Olymnpia from Delphi will take you approximately 3 and a half hours. You will depart frrom Delphi towards Itea, take the road towards Nafpaktos and head for the Rio-Antiorio bridge. You will have to pay about 12.00 Euro for the bridge toll or about 6.00 Euro if you take the small ferry boat just under the bridge. After that follow the Patras ring-road with direction to Pyrgos and just as you get to Pyrgos stay on the road that will bring you all the way to Olympia.