| Arouca to Nuth | 964.73 mi (1,552.58 km) |
| Arouca to Oegstgeest | 981.31 mi (1,579.27 km) |
| Arouca to Oirschot | 972.73 mi (1,565.46 km) |
| Arouca to Oisterwijk | 973.58 mi (1,566.83 km) |
| Arouca to Oldebroek | 1,036.66 mi (1,668.35 km) |
| Arouca to Oldenzaal | 1,062.17 mi (1,709.40 km) |
| Arouca to Ommen | 1,055.51 mi (1,698.67 km) |
| Arouca to Oosterend | 1,068.65 mi (1,719.82 km) |
| Arouca to Oosterhout | 965.94 mi (1,554.54 km) |
| Arouca to Oosterwolde | 1,074.58 mi (1,729.37 km) |
| Arouca to Oostzaan | 1,005.94 mi (1,618.91 km) |
| Arouca to Opmeer | 1,021.37 mi (1,643.74 km) |
| Arouca to Oss | 992.15 mi (1,596.71 km) |
| Arouca to Oud-Beijerland | 960.87 mi (1,546.37 km) |
| Arouca to Oudenbosch | 953.24 mi (1,534.08 km) |
