| Karhula to Oegstgeest | 1,027.03 mi (1,652.84 km) |
| Karhula to Oirschot | 1,034.34 mi (1,664.61 km) |
| Karhula to Oisterwijk | 1,033.28 mi (1,662.91 km) |
| Karhula to Oldebroek | 970.21 mi (1,561.40 km) |
| Karhula to Oldenzaal | 945.22 mi (1,521.18 km) |
| Karhula to Ommen | 951.24 mi (1,530.88 km) |
| Karhula to Oosterend | 939.22 mi (1,511.53 km) |
| Karhula to Oosterhout | 1,040.81 mi (1,675.02 km) |
| Karhula to Oosterwolde | 932.87 mi (1,501.31 km) |
| Karhula to Oostzaan | 1,002.38 mi (1,613.17 km) |
| Karhula to Opmeer | 987.94 mi (1,589.94 km) |
| Karhula to Oss | 1,014.73 mi (1,633.05 km) |
| Karhula to Oud-Beijerland | 1,046.47 mi (1,684.12 km) |
| Karhula to Oudenbosch | 1,053.60 mi (1,695.61 km) |
| Karhula to Oudewater | 1,022.54 mi (1,645.62 km) |
