| Alcamo to Oegstgeest | 1,063.72 mi (1,711.89 km) |
| Alcamo to Oirschot | 1,005.82 mi (1,618.71 km) |
| Alcamo to Oisterwijk | 1,012.85 mi (1,630.02 km) |
| Alcamo to Oldebroek | 1,056.15 mi (1,699.71 km) |
| Alcamo to Oldenzaal | 1,032.49 mi (1,661.63 km) |
| Alcamo to Ommen | 1,052.74 mi (1,694.23 km) |
| Alcamo to Oosterend | 1,089.37 mi (1,753.17 km) |
| Alcamo to Oosterhout | 1,022.88 mi (1,646.17 km) |
| Alcamo to Oosterwolde | 1,085.30 mi (1,746.62 km) |
| Alcamo to Oostzaan | 1,071.84 mi (1,724.96 km) |
| Alcamo to Opmeer | 1,087.50 mi (1,750.16 km) |
| Alcamo to Oss | 1,018.82 mi (1,639.63 km) |
| Alcamo to Oud-Beijerland | 1,042.30 mi (1,677.42 km) |
| Alcamo to Oudenbosch | 1,025.88 mi (1,650.99 km) |
| Alcamo to Oudewater | 1,046.01 mi (1,683.38 km) |
