| Dorchester to Oerlinghausen | 486.47 mi (782.90 km) |
| Dorchester to Oestrich-Winkel | 462.32 mi (744.03 km) |
| Dorchester to Offenburg | 489.27 mi (787.40 km) |
| Dorchester to Oftersheim | 497.30 mi (800.33 km) |
| Dorchester to Ohrdruf | 574.74 mi (924.95 km) |
| Dorchester to Ohringen | 540.20 mi (869.37 km) |
| Dorchester to Olbernhau | 688.96 mi (1,108.78 km) |
| Dorchester to Olching | 640.60 mi (1,030.94 km) |
| Dorchester to Oldenburg | 483.23 mi (777.68 km) |
| Dorchester to Oldenburg in Holstein | 611.23 mi (983.68 km) |
| Dorchester to Olfen | 430.25 mi (692.42 km) |
| Dorchester to Olpe | 447.97 mi (720.93 km) |
| Dorchester to Olsberg | 476.06 mi (766.15 km) |
| Dorchester to Oranienburg | 683.84 mi (1,100.53 km) |
| Dorchester to Ortenberg | 504.78 mi (812.37 km) |
