| Mount Holly to Nuth | 4,251.73 mi (6,842.50 km) |
| Mount Holly to Oegstgeest | 4,163.28 mi (6,700.14 km) |
| Mount Holly to Oirschot | 4,213.36 mi (6,780.75 km) |
| Mount Holly to Oisterwijk | 4,207.26 mi (6,770.94 km) |
| Mount Holly to Oldebroek | 4,213.27 mi (6,780.61 km) |
| Mount Holly to Oldenzaal | 4,257.17 mi (6,851.26 km) |
| Mount Holly to Ommen | 4,231.83 mi (6,810.47 km) |
| Mount Holly to Oosterend | 4,205.94 mi (6,768.80 km) |
| Mount Holly to Oosterhout | 4,192.04 mi (6,746.44 km) |
| Mount Holly to Oosterwolde | 4,214.99 mi (6,783.38 km) |
| Mount Holly to Oostzaan | 4,173.70 mi (6,716.92 km) |
| Mount Holly to Opmeer | 4,169.85 mi (6,710.72 km) |
| Mount Holly to Oss | 4,215.30 mi (6,783.87 km) |
| Mount Holly to Oud-Beijerland | 4,169.51 mi (6,710.17 km) |
| Mount Holly to Oudenbosch | 4,180.03 mi (6,727.11 km) |
