| Fort Oglethorpe to Oswego (Illinois) | 495.59 mi (797.57 km) |
| Fort Oglethorpe to Oswego (New York) | 751.31 mi (1,209.11 km) |
| Fort Oglethorpe to Otsego (Minnesota) | 838.99 mi (1,350.22 km) |
| Fort Oglethorpe to Ottawa (Illinois) | 484.48 mi (779.69 km) |
| Fort Oglethorpe to Ottawa (Kansas) | 609.18 mi (980.38 km) |
| Fort Oglethorpe to Ottumwa (Iowa) | 573.63 mi (923.16 km) |
| Fort Oglethorpe to Overland (Missouri) | 384.53 mi (618.85 km) |
| Fort Oglethorpe to Overland Park (Kansas) | 588.40 mi (946.93 km) |
| Fort Oglethorpe to Overlea (Maryland) | 569.55 mi (916.60 km) |
| Fort Oglethorpe to Oviedo (Florida) | 494.56 mi (795.91 km) |
| Fort Oglethorpe to Owasso (Oklahoma) | 601.61 mi (968.20 km) |
| Fort Oglethorpe to Owatonna (Minnesota) | 761.83 mi (1,226.05 km) |
| Fort Oglethorpe to Owensboro (Kentucky) | 221.26 mi (356.08 km) |
| Fort Oglethorpe to Owings Mills (Maryland) | 558.59 mi (898.97 km) |
| Fort Oglethorpe to Owosso (Michigan) | 560.09 mi (901.38 km) |
