Size comparison maps The longest distance you can travel between two points in a straight line without crossing any major bodies of water April 17, 2015 Alex The longest straight line you can walk without hitting the ocean. Distance: 13,572.40 kilometers (8,433.56 miles). Related Posts:Population employment ratioChickens Live stock data by countryInflation GDP Deflator by countryLife expectancy at birth in yearsPopulation Density of France MappedMaps of the Great LakesThe Deadliest Month in Every U.S. StateThe US & UK roads With The Biggest Gaps Between Toilets