On further research, it looks as though Toledo was a stop. On the Going "west bound" the flights would originate in Detroit, then to Toledo, then Dayton and/or Columbus, then Cincinnati. There was also a daily flight that would then continue from Cincinnati to Louisville and then to St. Louis. There were 5 west bound flights a day all on DC-3's. Going "east bound" there were 3 flights a day, two starting in Cincinnati, and one in Dayton, all flown with DC-3s, and ending in Detroit.