| Champaign to Nuth | 4,302.98 mi (6,924.98 km) |
| Champaign to Oegstgeest | 4,206.70 mi (6,770.03 km) |
| Champaign to Oirschot | 4,260.89 mi (6,857.24 km) |
| Champaign to Oisterwijk | 4,254.30 mi (6,846.64 km) |
| Champaign to Oldebroek | 4,250.39 mi (6,840.34 km) |
| Champaign to Oldenzaal | 4,292.69 mi (6,908.42 km) |
| Champaign to Ommen | 4,266.93 mi (6,866.95 km) |
| Champaign to Oosterend | 4,237.47 mi (6,819.55 km) |
| Champaign to Oosterhout | 4,239.46 mi (6,822.76 km) |
| Champaign to Oosterwolde | 4,246.05 mi (6,833.36 km) |
| Champaign to Oostzaan | 4,213.68 mi (6,781.26 km) |
| Champaign to Opmeer | 4,207.16 mi (6,770.77 km) |
| Champaign to Oss | 4,259.77 mi (6,855.44 km) |
| Champaign to Oud-Beijerland | 4,216.54 mi (6,785.87 km) |
| Champaign to Oudenbosch | 4,228.85 mi (6,805.68 km) |
