| Pianoro to Oerlinghausen | 538.08 mi (865.95 km) |
| Pianoro to Oestrich-Winkel | 418.34 mi (673.25 km) |
| Pianoro to Offenburg | 325.22 mi (523.39 km) |
| Pianoro to Oftersheim | 368.16 mi (592.50 km) |
| Pianoro to Ohrdruf | 446.17 mi (718.03 km) |
| Pianoro to Ohringen | 343.89 mi (553.43 km) |
| Pianoro to Olbernhau | 444.01 mi (714.57 km) |
| Pianoro to Olching | 263.71 mi (424.40 km) |
| Pianoro to Oldenburg | 621.59 mi (1,000.35 km) |
| Pianoro to Oldenburg in Holstein | 685.47 mi (1,103.16 km) |
| Pianoro to Olfen | 538.33 mi (866.35 km) |
| Pianoro to Olpe | 486.22 mi (782.49 km) |
| Pianoro to Olsberg | 499.05 mi (803.14 km) |
| Pianoro to Oranienburg | 584.84 mi (941.21 km) |
| Pianoro to Ortenberg | 426.15 mi (685.82 km) |
