| Carthage to Oswego (Illinois) | 447.18 mi (719.66 km) |
| Carthage to Oswego (New York) | 1,032.33 mi (1,661.38 km) |
| Carthage to Otsego (Minnesota) | 561.92 mi (904.33 km) |
| Carthage to Ottawa (Illinois) | 413.23 mi (665.02 km) |
| Carthage to Ottawa (Kansas) | 112.52 mi (181.09 km) |
| Carthage to Ottumwa (Iowa) | 286.15 mi (460.52 km) |
| Carthage to Overland (Missouri) | 240.48 mi (387.02 km) |
| Carthage to Overland Park (Kansas) | 121.62 mi (195.73 km) |
| Carthage to Overlea (Maryland) | 976.39 mi (1,571.35 km) |
| Carthage to Oviedo (Florida) | 960.07 mi (1,545.08 km) |
| Carthage to Owasso (Oklahoma) | 102.62 mi (165.16 km) |
| Carthage to Owatonna (Minnesota) | 482.96 mi (777.25 km) |
| Carthage to Owensboro (Kentucky) | 397.32 mi (639.43 km) |
| Carthage to Owings Mills (Maryland) | 962.00 mi (1,548.20 km) |
| Carthage to Owosso (Michigan) | 670.68 mi (1,079.35 km) |
