| Nizza Monferrato to Oegstgeest | 541.78 mi (871.90 km) |
| Nizza Monferrato to Oirschot | 485.44 mi (781.24 km) |
| Nizza Monferrato to Oisterwijk | 492.25 mi (792.20 km) |
| Nizza Monferrato to Oldebroek | 541.95 mi (872.19 km) |
| Nizza Monferrato to Oldenzaal | 525.12 mi (845.09 km) |
| Nizza Monferrato to Ommen | 542.14 mi (872.48 km) |
| Nizza Monferrato to Oosterend | 577.91 mi (930.06 km) |
| Nizza Monferrato to Oosterhout | 501.00 mi (806.28 km) |
| Nizza Monferrato to Oosterwolde | 575.27 mi (925.81 km) |
| Nizza Monferrato to Oostzaan | 552.25 mi (888.76 km) |
| Nizza Monferrato to Opmeer | 568.97 mi (915.68 km) |
| Nizza Monferrato to Oss | 500.32 mi (805.19 km) |
| Nizza Monferrato to Oud-Beijerland | 519.21 mi (835.59 km) |
| Nizza Monferrato to Oudenbosch | 502.65 mi (808.94 km) |
| Nizza Monferrato to Oudewater | 525.18 mi (845.20 km) |
