| Martinsburg to Oerlinghausen | 4,014.45 mi (6,460.64 km) |
| Martinsburg to Oestrich-Winkel | 4,045.92 mi (6,511.27 km) |
| Martinsburg to Offenburg | 4,089.45 mi (6,581.33 km) |
| Martinsburg to Oftersheim | 4,088.39 mi (6,579.62 km) |
| Martinsburg to Ohrdruf | 4,128.84 mi (6,644.72 km) |
| Martinsburg to Ohringen | 4,130.57 mi (6,647.50 km) |
| Martinsburg to Olbernhau | 4,234.81 mi (6,815.28 km) |
| Martinsburg to Olching | 4,235.98 mi (6,817.15 km) |
| Martinsburg to Oldenburg | 3,963.64 mi (6,378.86 km) |
| Martinsburg to Oldenburg in Holstein | 4,030.11 mi (6,485.84 km) |
| Martinsburg to Olfen | 3,971.73 mi (6,391.89 km) |
| Martinsburg to Olpe | 4,009.44 mi (6,452.56 km) |
| Martinsburg to Olsberg | 4,025.27 mi (6,478.04 km) |
| Martinsburg to Oranienburg | 4,163.88 mi (6,701.11 km) |
| Martinsburg to Ortenberg | 4,077.33 mi (6,561.83 km) |
