| Ilhavo to Nuth | 996.57 mi (1,603.82 km) |
| Ilhavo to Oegstgeest | 1,012.71 mi (1,629.81 km) |
| Ilhavo to Oirschot | 1,004.42 mi (1,616.46 km) |
| Ilhavo to Oisterwijk | 1,005.24 mi (1,617.78 km) |
| Ilhavo to Oldebroek | 1,068.22 mi (1,719.14 km) |
| Ilhavo to Oldenzaal | 1,093.88 mi (1,760.43 km) |
| Ilhavo to Ommen | 1,087.12 mi (1,749.55 km) |
| Ilhavo to Oosterend | 1,100.10 mi (1,770.44 km) |
| Ilhavo to Oosterhout | 997.55 mi (1,605.39 km) |
| Ilhavo to Oosterwolde | 1,106.07 mi (1,780.04 km) |
| Ilhavo to Oostzaan | 1,037.35 mi (1,669.46 km) |
| Ilhavo to Opmeer | 1,052.72 mi (1,694.19 km) |
| Ilhavo to Oss | 1,023.81 mi (1,647.66 km) |
| Ilhavo to Oud-Beijerland | 992.36 mi (1,597.04 km) |
| Ilhavo to Oudenbosch | 984.80 mi (1,584.88 km) |
