Richard the Lionheart traveled for about two years, in a trip that could take up to three years, and that in some civil pilgrimages (not of armies) could be reached in little more than a year. The distance calculated by Google Maps from London England, to Israel, Jerusalem, is 3,607.65 km (2,241.69 miles) by plane, but if we assume that your journey was not straight and had to cross by sea, from the coast of Italy to Jerusalem, then could travel up to 2300 or 2350 miles in total, including detours and detours of cities or enemy or non-passable areas.