| Casamassima to Oerlinghausen | 855.21 mi (1,376.33 km) |
| Casamassima to Oestrich-Winkel | 758.84 mi (1,221.24 km) |
| Casamassima to Offenburg | 680.46 mi (1,095.09 km) |
| Casamassima to Oftersheim | 708.47 mi (1,140.18 km) |
| Casamassima to Ohrdruf | 743.84 mi (1,197.10 km) |
| Casamassima to Ohringen | 674.45 mi (1,085.42 km) |
| Casamassima to Olbernhau | 692.97 mi (1,115.22 km) |
| Casamassima to Olching | 571.37 mi (919.53 km) |
| Casamassima to Oldenburg | 935.26 mi (1,505.15 km) |
| Casamassima to Oldenburg in Holstein | 963.36 mi (1,550.38 km) |
| Casamassima to Olfen | 870.27 mi (1,400.57 km) |
| Casamassima to Olpe | 819.57 mi (1,318.97 km) |
| Casamassima to Olsberg | 822.94 mi (1,324.40 km) |
| Casamassima to Oranienburg | 833.65 mi (1,341.62 km) |
| Casamassima to Ortenberg | 751.69 mi (1,209.73 km) |
