The drive from Auburn to St. Louis is approximately 880 km. You will take I-85 North to Montgomery, then I-65 North to Nashville, and finally I-24 West to I-64 West into St. Louis. This is a major cross-country route. Expect heavy traffic in Nashville. The route is straightforward and offers many service options.
Total Distance: 880 km driving distance; 780 km straight-line air distance.
Stop in Nashville for a quick lunch to break up the long drive.
May or September for pleasant weather.