| North Charleston to Oswego (Illinois) | 756.88 mi (1,218.09 km) |
| North Charleston to Oswego (New York) | 753.76 mi (1,213.06 km) |
| North Charleston to Otsego (Minnesota) | 1,118.05 mi (1,799.33 km) |
| North Charleston to Ottawa (Illinois) | 756.30 mi (1,217.14 km) |
| North Charleston to Ottawa (Kansas) | 936.65 mi (1,507.40 km) |
| North Charleston to Ottumwa (Iowa) | 880.94 mi (1,417.73 km) |
| North Charleston to Overland (Missouri) | 701.38 mi (1,128.77 km) |
| North Charleston to Overland Park (Kansas) | 914.90 mi (1,472.39 km) |
| North Charleston to Overlea (Maryland) | 488.16 mi (785.62 km) |
| North Charleston to Oviedo (Florida) | 300.92 mi (484.28 km) |
| North Charleston to Owasso (Oklahoma) | 925.04 mi (1,488.71 km) |
| North Charleston to Owatonna (Minnesota) | 1,047.83 mi (1,686.33 km) |
| North Charleston to Owensboro (Kentucky) | 519.35 mi (835.81 km) |
| North Charleston to Owings Mills (Maryland) | 485.18 mi (780.81 km) |
| North Charleston to Owosso (Michigan) | 731.79 mi (1,177.71 km) |
