| Kalkara to Oegstgeest | 1,229.04 mi (1,977.94 km) |
| Kalkara to Oirschot | 1,170.82 mi (1,884.24 km) |
| Kalkara to Oisterwijk | 1,177.88 mi (1,895.62 km) |
| Kalkara to Oldebroek | 1,219.47 mi (1,962.55 km) |
| Kalkara to Oldenzaal | 1,194.36 mi (1,922.14 km) |
| Kalkara to Ommen | 1,215.24 mi (1,955.75 km) |
| Kalkara to Oosterend | 1,251.93 mi (2,014.78 km) |
| Kalkara to Oosterhout | 1,188.25 mi (1,912.31 km) |
| Kalkara to Oosterwolde | 1,247.53 mi (2,007.71 km) |
| Kalkara to Oostzaan | 1,236.47 mi (1,989.91 km) |
| Kalkara to Opmeer | 1,251.82 mi (2,014.61 km) |
| Kalkara to Oss | 1,183.30 mi (1,904.34 km) |
| Kalkara to Oud-Beijerland | 1,207.99 mi (1,944.08 km) |
| Kalkara to Oudenbosch | 1,191.64 mi (1,917.76 km) |
| Kalkara to Oudewater | 1,211.03 mi (1,948.97 km) |
