| Cittadella to Oerlinghausen | 458.79 mi (738.35 km) |
| Cittadella to Oestrich-Winkel | 347.94 mi (559.95 km) |
| Cittadella to Offenburg | 265.86 mi (427.85 km) |
| Cittadella to Oftersheim | 297.20 mi (478.30 km) |
| Cittadella to Ohrdruf | 361.01 mi (580.99 km) |
| Cittadella to Ohringen | 267.47 mi (430.44 km) |
| Cittadella to Olbernhau | 353.88 mi (569.52 km) |
| Cittadella to Olching | 177.56 mi (285.75 km) |
| Cittadella to Oldenburg | 541.91 mi (872.12 km) |
| Cittadella to Oldenburg in Holstein | 598.98 mi (963.97 km) |
| Cittadella to Olfen | 464.54 mi (747.60 km) |
| Cittadella to Olpe | 412.66 mi (664.12 km) |
| Cittadella to Olsberg | 421.70 mi (678.67 km) |
| Cittadella to Oranienburg | 495.21 mi (796.96 km) |
| Cittadella to Ortenberg | 348.68 mi (561.14 km) |
