| Pontardulais to Oerlinghausen | 542.07 mi (872.37 km) |
| Pontardulais to Oestrich-Winkel | 537.61 mi (865.20 km) |
| Pontardulais to Offenburg | 575.28 mi (925.82 km) |
| Pontardulais to Oftersheim | 576.61 mi (927.96 km) |
| Pontardulais to Ohrdruf | 640.41 mi (1,030.64 km) |
| Pontardulais to Ohringen | 619.33 mi (996.71 km) |
| Pontardulais to Olbernhau | 753.99 mi (1,213.43 km) |
| Pontardulais to Olching | 722.80 mi (1,163.24 km) |
| Pontardulais to Oldenburg | 525.00 mi (844.91 km) |
| Pontardulais to Oldenburg in Holstein | 644.35 mi (1,036.99 km) |
| Pontardulais to Olfen | 488.53 mi (786.22 km) |
| Pontardulais to Olpe | 513.88 mi (827.01 km) |
| Pontardulais to Olsberg | 538.20 mi (866.16 km) |
| Pontardulais to Oranienburg | 732.87 mi (1,179.45 km) |
| Pontardulais to Ortenberg | 575.83 mi (926.71 km) |
