| Thonon-les-Bains to Oria | 689.97 mi (1,110.41 km) |
| Thonon-les-Bains to Oristano | 458.67 mi (738.15 km) |
| Thonon-les-Bains to Orta Nova | 576.17 mi (927.25 km) |
| Thonon-les-Bains to Orte | 397.05 mi (639.00 km) |
| Thonon-les-Bains to Ortona | 479.36 mi (771.46 km) |
| Thonon-les-Bains to Orvieto | 374.55 mi (602.79 km) |
| Thonon-les-Bains to Orzinuovi | 179.13 mi (288.28 km) |
| Thonon-les-Bains to Osimo | 396.18 mi (637.60 km) |
| Thonon-les-Bains to Ospitaletto | 181.59 mi (292.25 km) |
| Thonon-les-Bains to Ostuni | 677.76 mi (1,090.75 km) |
| Thonon-les-Bains to Ottaviano | 552.07 mi (888.48 km) |
| Thonon-les-Bains to Ovada | 158.85 mi (255.65 km) |
| Thonon-les-Bains to Ozieri | 418.79 mi (673.98 km) |
| Thonon-les-Bains to Paceco | 656.75 mi (1,056.94 km) |
| Thonon-les-Bains to Pachino | 800.88 mi (1,288.89 km) |
