| Calera to Nuth | 4,589.40 mi (7,385.92 km) |
| Calera to Oegstgeest | 4,498.81 mi (7,240.14 km) |
| Calera to Oirschot | 4,550.03 mi (7,322.57 km) |
| Calera to Oisterwijk | 4,543.80 mi (7,312.54 km) |
| Calera to Oldebroek | 4,547.29 mi (7,318.16 km) |
| Calera to Oldenzaal | 4,590.87 mi (7,388.29 km) |
| Calera to Ommen | 4,565.36 mi (7,347.24 km) |
| Calera to Oosterend | 4,538.47 mi (7,303.96 km) |
| Calera to Oosterhout | 4,528.65 mi (7,288.15 km) |
| Calera to Oosterwolde | 4,547.42 mi (7,318.36 km) |
| Calera to Oostzaan | 4,508.38 mi (7,255.53 km) |
| Calera to Opmeer | 4,503.83 mi (7,248.21 km) |
| Calera to Oss | 4,551.21 mi (7,324.46 km) |
| Calera to Oud-Beijerland | 4,505.97 mi (7,251.65 km) |
| Calera to Oudenbosch | 4,516.95 mi (7,269.34 km) |
