| Dorchester to Octeville | 83.00 mi (133.58 km) |
| Dorchester to Oignies | 238.74 mi (384.22 km) |
| Dorchester to Oissel | 183.08 mi (294.64 km) |
| Dorchester to Olivet | 277.44 mi (446.49 km) |
| Dorchester to Ollioules | 652.42 mi (1,049.96 km) |
| Dorchester to Olonne-sur-Mer | 290.35 mi (467.27 km) |
| Dorchester to Oloron-Sainte-Marie | 526.74 mi (847.70 km) |
| Dorchester to Onet Village | 497.25 mi (800.24 km) |
| Dorchester to Onnaing | 265.82 mi (427.80 km) |
| Dorchester to Orange | 566.20 mi (911.22 km) |
| Dorchester to Orchies | 249.66 mi (401.79 km) |
| Dorchester to Orleans | 275.77 mi (443.80 km) |
| Dorchester to Orly | 255.03 mi (410.43 km) |
| Dorchester to Ormesson-sur-Marne | 258.96 mi (416.75 km) |
| Dorchester to Orsay | 249.17 mi (400.99 km) |
