| Dorchester to Oberkirch | 493.90 mi (794.86 km) |
| Dorchester to Obernburg am Main | 514.26 mi (827.62 km) |
| Dorchester to Obernkirchen | 507.91 mi (817.40 km) |
| Dorchester to Oberschleissheim | 650.15 mi (1,046.31 km) |
| Dorchester to Oberstdorf | 618.33 mi (995.11 km) |
| Dorchester to Obertraubling | 660.72 mi (1,063.32 km) |
| Dorchester to Obertshausen | 497.98 mi (801.41 km) |
| Dorchester to Oberursel | 485.29 mi (781.00 km) |
| Dorchester to Ochsenfurt | 557.38 mi (897.02 km) |
| Dorchester to Ochsenhausen | 585.29 mi (941.93 km) |
| Dorchester to Ochtrup | 426.68 mi (686.67 km) |
| Dorchester to Odenthal | 416.81 mi (670.79 km) |
| Dorchester to Oelde | 463.64 mi (746.16 km) |
| Dorchester to Oelsnitz | 640.19 mi (1,030.29 km) |
| Dorchester to Oer-Erkenschwick | 424.14 mi (682.58 km) |
