| Formello to Oerlinghausen | 704.90 mi (1,134.43 km) |
| Formello to Oestrich-Winkel | 586.02 mi (943.11 km) |
| Formello to Offenburg | 491.41 mi (790.84 km) |
| Formello to Oftersheim | 535.90 mi (862.44 km) |
| Formello to Ohrdruf | 609.35 mi (980.66 km) |
| Formello to Ohringen | 511.18 mi (822.66 km) |
| Formello to Olbernhau | 594.71 mi (957.09 km) |
| Formello to Olching | 425.90 mi (685.41 km) |
| Formello to Oldenburg | 788.34 mi (1,268.72 km) |
| Formello to Oldenburg in Holstein | 846.93 mi (1,363.00 km) |
| Formello to Olfen | 706.06 mi (1,136.29 km) |
| Formello to Olpe | 653.94 mi (1,052.42 km) |
| Formello to Olsberg | 666.36 mi (1,072.40 km) |
| Formello to Oranienburg | 738.33 mi (1,188.22 km) |
| Formello to Ortenberg | 593.35 mi (954.91 km) |
