| Cologno Monzese to Oegstgeest | 508.90 mi (818.99 km) |
| Cologno Monzese to Oirschot | 450.81 mi (725.51 km) |
| Cologno Monzese to Oisterwijk | 457.85 mi (736.84 km) |
| Cologno Monzese to Oldebroek | 502.01 mi (807.90 km) |
| Cologno Monzese to Oldenzaal | 480.87 mi (773.89 km) |
| Cologno Monzese to Ommen | 499.83 mi (804.40 km) |
| Cologno Monzese to Oosterend | 536.25 mi (863.01 km) |
| Cologno Monzese to Oosterhout | 468.10 mi (753.34 km) |
| Cologno Monzese to Oosterwolde | 532.73 mi (857.35 km) |
| Cologno Monzese to Oostzaan | 516.78 mi (831.68 km) |
| Cologno Monzese to Opmeer | 532.52 mi (857.00 km) |
| Cologno Monzese to Oss | 463.80 mi (746.41 km) |
| Cologno Monzese to Oud-Beijerland | 487.90 mi (785.19 km) |
| Cologno Monzese to Oudenbosch | 471.58 mi (758.94 km) |
| Cologno Monzese to Oudewater | 491.01 mi (790.20 km) |
