| Dumont to Oerlinghausen | 3,790.14 mi (6,099.65 km) |
| Dumont to Oestrich-Winkel | 3,819.06 mi (6,146.18 km) |
| Dumont to Offenburg | 3,861.01 mi (6,213.70 km) |
| Dumont to Oftersheim | 3,861.05 mi (6,213.76 km) |
| Dumont to Ohrdruf | 3,903.87 mi (6,282.68 km) |
| Dumont to Ohringen | 3,903.36 mi (6,281.85 km) |
| Dumont to Olbernhau | 4,010.66 mi (6,454.53 km) |
| Dumont to Olching | 4,008.38 mi (6,450.87 km) |
| Dumont to Oldenburg | 3,740.73 mi (6,020.13 km) |
| Dumont to Oldenburg in Holstein | 3,809.88 mi (6,131.41 km) |
| Dumont to Olfen | 3,746.67 mi (6,029.68 km) |
| Dumont to Olpe | 3,783.68 mi (6,089.24 km) |
| Dumont to Olsberg | 3,800.13 mi (6,115.71 km) |
| Dumont to Oranienburg | 3,942.38 mi (6,344.64 km) |
| Dumont to Ortenberg | 3,851.22 mi (6,197.94 km) |
