| Mercogliano to Oegstgeest | 916.52 mi (1,475.00 km) |
| Mercogliano to Oirschot | 857.43 mi (1,379.90 km) |
| Mercogliano to Oisterwijk | 864.61 mi (1,391.45 km) |
| Mercogliano to Oldebroek | 898.43 mi (1,445.89 km) |
| Mercogliano to Oldenzaal | 868.89 mi (1,398.35 km) |
| Mercogliano to Ommen | 891.48 mi (1,434.69 km) |
| Mercogliano to Oosterend | 927.98 mi (1,493.44 km) |
| Mercogliano to Oosterhout | 876.56 mi (1,410.69 km) |
| Mercogliano to Oosterwolde | 922.63 mi (1,484.83 km) |
| Mercogliano to Oostzaan | 920.55 mi (1,481.48 km) |
| Mercogliano to Opmeer | 934.31 mi (1,503.63 km) |
| Mercogliano to Oss | 867.33 mi (1,395.84 km) |
| Mercogliano to Oud-Beijerland | 897.86 mi (1,444.96 km) |
| Mercogliano to Oudenbosch | 882.13 mi (1,419.66 km) |
| Mercogliano to Oudewater | 897.28 mi (1,444.03 km) |
