| Grosseto to Octeville | 770.32 mi (1,239.72 km) |
| Grosseto to Oignies | 655.84 mi (1,055.47 km) |
| Grosseto to Oissel | 659.79 mi (1,061.83 km) |
| Grosseto to Olivet | 568.38 mi (914.73 km) |
| Grosseto to Ollioules | 266.85 mi (429.46 km) |
| Grosseto to Olonne-sur-Mer | 683.21 mi (1,099.52 km) |
| Grosseto to Oloron-Sainte-Marie | 592.00 mi (952.73 km) |
| Grosseto to Onet Village | 439.73 mi (707.67 km) |
| Grosseto to Onnaing | 635.06 mi (1,022.03 km) |
| Grosseto to Orange | 329.34 mi (530.01 km) |
| Grosseto to Orchies | 649.29 mi (1,044.93 km) |
| Grosseto to Orleans | 569.60 mi (916.68 km) |
| Grosseto to Orly | 588.14 mi (946.53 km) |
| Grosseto to Ormesson-sur-Marne | 585.12 mi (941.66 km) |
| Grosseto to Orsay | 593.15 mi (954.59 km) |
