| Darby to Nuth | 3,805.01 mi (6,123.58 km) |
| Darby to Oegstgeest | 3,716.23 mi (5,980.70 km) |
| Darby to Oirschot | 3,766.47 mi (6,061.55 km) |
| Darby to Oisterwijk | 3,760.36 mi (6,051.71 km) |
| Darby to Oldebroek | 3,766.09 mi (6,060.93 km) |
| Darby to Oldenzaal | 3,809.97 mi (6,131.55 km) |
| Darby to Ommen | 3,784.61 mi (6,090.74 km) |
| Darby to Oosterend | 3,758.67 mi (6,049.00 km) |
| Darby to Oosterhout | 3,745.14 mi (6,027.23 km) |
| Darby to Oosterwolde | 3,767.73 mi (6,063.57 km) |
| Darby to Oostzaan | 3,726.56 mi (5,997.32 km) |
| Darby to Opmeer | 3,722.66 mi (5,991.04 km) |
| Darby to Oss | 3,768.30 mi (6,064.50 km) |
| Darby to Oud-Beijerland | 3,722.58 mi (5,990.92 km) |
| Darby to Oudenbosch | 3,733.18 mi (6,007.97 km) |
