| Effingham to Nuth | 4,361.94 mi (7,019.87 km) |
| Effingham to Oegstgeest | 4,266.16 mi (6,865.73 km) |
| Effingham to Oirschot | 4,320.09 mi (6,952.52 km) |
| Effingham to Oisterwijk | 4,313.54 mi (6,941.96 km) |
| Effingham to Oldebroek | 4,310.33 mi (6,936.81 km) |
| Effingham to Oldenzaal | 4,352.78 mi (7,005.12 km) |
| Effingham to Ommen | 4,327.02 mi (6,963.67 km) |
| Effingham to Oosterend | 4,297.80 mi (6,916.64 km) |
| Effingham to Oosterhout | 4,298.66 mi (6,918.02 km) |
| Effingham to Oosterwolde | 4,306.42 mi (6,930.51 km) |
| Effingham to Oostzaan | 4,273.39 mi (6,877.36 km) |
| Effingham to Opmeer | 4,267.06 mi (6,867.17 km) |
| Effingham to Oss | 4,319.19 mi (6,951.07 km) |
| Effingham to Oud-Beijerland | 4,275.75 mi (6,881.15 km) |
| Effingham to Oudenbosch | 4,287.94 mi (6,900.77 km) |
