| Viareggio to Oerlinghausen | 564.37 mi (908.27 km) |
| Viareggio to Oestrich-Winkel | 436.78 mi (702.93 km) |
| Viareggio to Offenburg | 336.54 mi (541.61 km) |
| Viareggio to Oftersheim | 388.35 mi (624.99 km) |
| Viareggio to Ohrdruf | 481.48 mi (774.86 km) |
| Viareggio to Ohringen | 370.18 mi (595.74 km) |
| Viareggio to Olbernhau | 491.41 mi (790.86 km) |
| Viareggio to Olching | 303.69 mi (488.75 km) |
| Viareggio to Oldenburg | 647.63 mi (1,042.26 km) |
| Viareggio to Oldenburg in Holstein | 721.40 mi (1,160.98 km) |
| Viareggio to Olfen | 558.32 mi (898.53 km) |
| Viareggio to Olpe | 506.66 mi (815.39 km) |
| Viareggio to Olsberg | 523.48 mi (842.46 km) |
| Viareggio to Oranienburg | 629.05 mi (1,012.35 km) |
| Viareggio to Ortenberg | 451.81 mi (727.12 km) |
