| Grosseto to Oerlinghausen | 645.68 mi (1,039.12 km) |
| Grosseto to Oestrich-Winkel | 521.03 mi (838.52 km) |
| Grosseto to Offenburg | 422.42 mi (679.82 km) |
| Grosseto to Oftersheim | 471.87 mi (759.41 km) |
| Grosseto to Ohrdruf | 557.26 mi (896.82 km) |
| Grosseto to Ohringen | 451.06 mi (725.91 km) |
| Grosseto to Olbernhau | 555.92 mi (894.67 km) |
| Grosseto to Olching | 375.55 mi (604.39 km) |
| Grosseto to Oldenburg | 729.17 mi (1,173.48 km) |
| Grosseto to Oldenburg in Holstein | 796.93 mi (1,282.54 km) |
| Grosseto to Olfen | 642.27 mi (1,033.63 km) |
| Grosseto to Olpe | 590.36 mi (950.10 km) |
| Grosseto to Olsberg | 605.60 mi (974.62 km) |
| Grosseto to Oranienburg | 697.10 mi (1,121.87 km) |
| Grosseto to Ortenberg | 533.22 mi (858.14 km) |
