| Martinsburg to Oswego (Illinois) | 564.62 mi (908.67 km) |
| Martinsburg to Oswego (New York) | 286.31 mi (460.77 km) |
| Martinsburg to Otsego (Minnesota) | 891.67 mi (1,435.00 km) |
| Martinsburg to Ottawa (Illinois) | 585.19 mi (941.77 km) |
| Martinsburg to Ottawa (Kansas) | 928.27 mi (1,493.91 km) |
| Martinsburg to Ottumwa (Iowa) | 768.35 mi (1,236.54 km) |
| Martinsburg to Overland (Missouri) | 666.18 mi (1,072.11 km) |
| Martinsburg to Overland Park (Kansas) | 894.62 mi (1,439.75 km) |
| Martinsburg to Overlea (Maryland) | 78.21 mi (125.87 km) |
| Martinsburg to Oviedo (Florida) | 768.35 mi (1,236.54 km) |
| Martinsburg to Owasso (Oklahoma) | 996.27 mi (1,603.35 km) |
| Martinsburg to Owatonna (Minnesota) | 847.04 mi (1,363.18 km) |
| Martinsburg to Owensboro (Kentucky) | 507.01 mi (815.96 km) |
| Martinsburg to Owings Mills (Maryland) | 63.39 mi (102.01 km) |
| Martinsburg to Owosso (Michigan) | 404.14 mi (650.40 km) |
