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 yearsMaps of the Great LakesThe US & UK roads With The Biggest Gaps Between ToiletsEpic Animal Migrations: How Far Can They Go?The Best Push Pin World Maps