| Greven to Octeville | 437.55 mi (704.17 km) |
| Greven to Oignies | 228.73 mi (368.10 km) |
| Greven to Oissel | 342.40 mi (551.04 km) |
| Greven to Olivet | 386.60 mi (622.18 km) |
| Greven to Ollioules | 623.91 mi (1,004.09 km) |
| Greven to Olonne-sur-Mer | 570.05 mi (917.41 km) |
| Greven to Oloron-Sainte-Marie | 722.97 mi (1,163.50 km) |
| Greven to Onet Village | 581.24 mi (935.41 km) |
| Greven to Onnaing | 209.60 mi (337.31 km) |
| Greven to Orange | 564.37 mi (908.27 km) |
| Greven to Orchies | 219.15 mi (352.69 km) |
| Greven to Orleans | 384.28 mi (618.45 km) |
| Greven to Orly | 325.77 mi (524.27 km) |
| Greven to Ormesson-sur-Marne | 319.15 mi (513.62 km) |
| Greven to Orsay | 334.47 mi (538.28 km) |
