| Viareggio to Octeville | 688.24 mi (1,107.61 km) |
| Viareggio to Oignies | 568.87 mi (915.51 km) |
| Viareggio to Oissel | 575.57 mi (926.29 km) |
| Viareggio to Olivet | 487.06 mi (783.85 km) |
| Viareggio to Ollioules | 226.32 mi (364.23 km) |
| Viareggio to Olonne-sur-Mer | 612.99 mi (986.51 km) |
| Viareggio to Oloron-Sainte-Marie | 545.46 mi (877.84 km) |
| Viareggio to Onet Village | 381.23 mi (613.54 km) |
| Viareggio to Onnaing | 547.94 mi (881.83 km) |
| Viareggio to Orange | 271.01 mi (436.14 km) |
| Viareggio to Orchies | 562.24 mi (904.84 km) |
| Viareggio to Orleans | 488.13 mi (785.57 km) |
| Viareggio to Orly | 503.71 mi (810.64 km) |
| Viareggio to Ormesson-sur-Marne | 500.43 mi (805.37 km) |
| Viareggio to Orsay | 509.06 mi (819.26 km) |
