| McCalla to Nuth | 4,591.84 mi (7,389.86 km) |
| McCalla to Oegstgeest | 4,500.95 mi (7,243.57 km) |
| McCalla to Oirschot | 4,552.33 mi (7,326.27 km) |
| McCalla to Oisterwijk | 4,546.08 mi (7,316.21 km) |
| McCalla to Oldebroek | 4,549.19 mi (7,321.22 km) |
| McCalla to Oldenzaal | 4,592.72 mi (7,391.26 km) |
| McCalla to Ommen | 4,567.19 mi (7,350.17 km) |
| McCalla to Oosterend | 4,540.15 mi (7,306.67 km) |
| McCalla to Oosterhout | 4,530.94 mi (7,291.84 km) |
| McCalla to Oosterwolde | 4,549.09 mi (7,321.05 km) |
| McCalla to Oostzaan | 4,510.38 mi (7,258.75 km) |
| McCalla to Opmeer | 4,505.73 mi (7,251.26 km) |
| McCalla to Oss | 4,553.39 mi (7,327.97 km) |
| McCalla to Oud-Beijerland | 4,508.24 mi (7,255.30 km) |
| McCalla to Oudenbosch | 4,519.30 mi (7,273.10 km) |
