| Knokke-Heist to Oegstgeest | 77.00 mi (123.92 km) |
| Knokke-Heist to Oirschot | 87.42 mi (140.70 km) |
| Knokke-Heist to Oisterwijk | 84.03 mi (135.23 km) |
| Knokke-Heist to Oldebroek | 135.19 mi (217.57 km) |
| Knokke-Heist to Oldenzaal | 169.63 mi (273.00 km) |
| Knokke-Heist to Ommen | 156.11 mi (251.23 km) |
| Knokke-Heist to Oosterend | 164.48 mi (264.71 km) |
| Knokke-Heist to Oosterhout | 70.68 mi (113.75 km) |
| Knokke-Heist to Oosterwolde | 170.83 mi (274.93 km) |
| Knokke-Heist to Oostzaan | 101.61 mi (163.53 km) |
| Knokke-Heist to Opmeer | 117.52 mi (189.13 km) |
| Knokke-Heist to Oss | 100.19 mi (161.25 km) |
| Knokke-Heist to Oud-Beijerland | 57.99 mi (93.32 km) |
| Knokke-Heist to Oudenbosch | 55.93 mi (90.01 km) |
| Knokke-Heist to Oudewater | 82.20 mi (132.29 km) |
