The concurrency of US 54 and US 400 continues through Augusta in Butler County before US 400 heads east toward the Missouri state line, while US 54 forms a brief concurrency with US 77 through El Dorado. At El Dorado, US 54 continues its easterly course through rural areas in Greenwood and Woodson counties before passing through the cities of Iola and Fort Scott; US 77 heads north to Junction City. US 54 exits Kansas in Bourbon County before reaching Nevada, Missouri.