| Simmerath to Octeville | 358.10 mi (576.31 km) |
| Simmerath to Oignies | 145.46 mi (234.10 km) |
| Simmerath to Oissel | 247.17 mi (397.78 km) |
| Simmerath to Olivet | 274.01 mi (440.98 km) |
| Simmerath to Ollioules | 515.92 mi (830.29 km) |
| Simmerath to Olonne-sur-Mer | 463.32 mi (745.63 km) |
| Simmerath to Oloron-Sainte-Marie | 606.15 mi (975.51 km) |
| Simmerath to Onet Village | 464.07 mi (746.84 km) |
| Simmerath to Onnaing | 119.64 mi (192.55 km) |
| Simmerath to Orange | 451.85 mi (727.18 km) |
| Simmerath to Orchies | 134.45 mi (216.37 km) |
| Simmerath to Orleans | 271.85 mi (437.50 km) |
| Simmerath to Orly | 216.67 mi (348.69 km) |
| Simmerath to Ormesson-sur-Marne | 209.66 mi (337.42 km) |
| Simmerath to Orsay | 226.02 mi (363.75 km) |
