The drive from River Forest to Tulsa is approximately 700 miles. You will head south on I-55 through St. Louis, then transition to I-44 W toward Tulsa. This is a long-distance drive taking about 11 hours. You will cross through Missouri and into Oklahoma.
Total Distance: 1,130 km driving distance; 950 km straight-line air distance.
Stop in St. Louis for a meal and to stretch your legs.
Spring or fall to avoid extreme summer heat.