| Ponte San Pietro to Oerlinghausen | 435.15 mi (700.31 km) |
| Ponte San Pietro to Oestrich-Winkel | 306.22 mi (492.81 km) |
| Ponte San Pietro to Offenburg | 206.53 mi (332.39 km) |
| Ponte San Pietro to Oftersheim | 258.04 mi (415.27 km) |
| Ponte San Pietro to Ohrdruf | 358.35 mi (576.70 km) |
| Ponte San Pietro to Ohringen | 242.01 mi (389.48 km) |
| Ponte San Pietro to Olbernhau | 384.11 mi (618.17 km) |
| Ponte San Pietro to Olching | 191.13 mi (307.60 km) |
| Ponte San Pietro to Oldenburg | 518.14 mi (833.87 km) |
| Ponte San Pietro to Oldenburg in Holstein | 597.10 mi (960.95 km) |
| Ponte San Pietro to Olfen | 427.79 mi (688.46 km) |
| Ponte San Pietro to Olpe | 376.20 mi (605.43 km) |
| Ponte San Pietro to Olsberg | 393.78 mi (633.72 km) |
| Ponte San Pietro to Oranienburg | 514.44 mi (827.91 km) |
| Ponte San Pietro to Ortenberg | 322.77 mi (519.46 km) |
