| Grosseto to Oberkirch | 424.15 mi (682.60 km) |
| Grosseto to Obernburg am Main | 497.53 mi (800.70 km) |
| Grosseto to Obernkirchen | 662.78 mi (1,066.65 km) |
| Grosseto to Oberschleissheim | 379.53 mi (610.80 km) |
| Grosseto to Oberstdorf | 323.28 mi (520.27 km) |
| Grosseto to Obertraubling | 431.37 mi (694.22 km) |
| Grosseto to Obertshausen | 515.74 mi (830.01 km) |
| Grosseto to Oberursel | 527.57 mi (849.04 km) |
| Grosseto to Ochsenfurt | 478.14 mi (769.49 km) |
| Grosseto to Ochsenhausen | 370.79 mi (596.74 km) |
| Grosseto to Ochtrup | 676.97 mi (1,089.48 km) |
| Grosseto to Odenthal | 601.09 mi (967.37 km) |
| Grosseto to Oelde | 641.37 mi (1,032.18 km) |
| Grosseto to Oelsnitz | 530.97 mi (854.51 km) |
| Grosseto to Oer-Erkenschwick | 639.07 mi (1,028.48 km) |
