| Ilion to Oegstgeest | 1,346.58 mi (2,167.11 km) |
| Ilion to Oirschot | 1,289.23 mi (2,074.81 km) |
| Ilion to Oisterwijk | 1,296.19 mi (2,086.02 km) |
| Ilion to Oldebroek | 1,312.62 mi (2,112.46 km) |
| Ilion to Oldenzaal | 1,274.55 mi (2,051.19 km) |
| Ilion to Ommen | 1,299.83 mi (2,091.87 km) |
| Ilion to Oosterend | 1,333.64 mi (2,146.29 km) |
| Ilion to Oosterhout | 1,310.26 mi (2,108.66 km) |
| Ilion to Oosterwolde | 1,326.28 mi (2,134.43 km) |
| Ilion to Oostzaan | 1,344.04 mi (2,163.02 km) |
| Ilion to Opmeer | 1,353.91 mi (2,178.91 km) |
| Ilion to Oss | 1,293.79 mi (2,082.15 km) |
| Ilion to Oud-Beijerland | 1,333.04 mi (2,145.32 km) |
| Ilion to Oudenbosch | 1,319.20 mi (2,123.05 km) |
| Ilion to Oudewater | 1,326.15 mi (2,134.23 km) |
