As I noted a few months ago, Southern Railway once tried to compete with ACL and SAL in the New York-Florida market but dropped out in about 1915. Instead, its main market was New York-New Orleans, but it also ran trains between the Midwest and Florida.
Click image to download a 25.5-MB PDF of this timetable contributed by Ellery Goode.
The Midwest trains included the Cincinnati-Jacksonville Ponce de Leon and Royal Palm and the Kansas City-Jacksonville (via Frisco to Birmingham) Kansas City Florida Special. This timetable also has trains between New York and Asheville, Asheville and Jacksonville, Cincinnati and Greensboro, Cincinnati and New Orleans, Washington and Augusta, and many other routes.