| Chalfont Saint Peter to Oerlinghausen | 394.70 mi (635.20 km) |
| Chalfont Saint Peter to Oestrich-Winkel | 389.49 mi (626.82 km) |
| Chalfont Saint Peter to Offenburg | 434.36 mi (699.04 km) |
| Chalfont Saint Peter to Oftersheim | 430.14 mi (692.24 km) |
| Chalfont Saint Peter to Ohrdruf | 491.01 mi (790.20 km) |
| Chalfont Saint Peter to Ohringen | 472.57 mi (760.53 km) |
| Chalfont Saint Peter to Olbernhau | 604.72 mi (973.20 km) |
| Chalfont Saint Peter to Olching | 577.54 mi (929.46 km) |
| Chalfont Saint Peter to Oldenburg | 384.58 mi (618.91 km) |
| Chalfont Saint Peter to Oldenburg in Holstein | 510.51 mi (821.59 km) |
| Chalfont Saint Peter to Olfen | 340.18 mi (547.47 km) |
| Chalfont Saint Peter to Olpe | 364.41 mi (586.46 km) |
| Chalfont Saint Peter to Olsberg | 389.13 mi (626.25 km) |
| Chalfont Saint Peter to Oranienburg | 588.77 mi (947.54 km) |
| Chalfont Saint Peter to Ortenberg | 426.59 mi (686.54 km) |
