| Neckargemund to Oegstgeest | 269.96 mi (434.46 km) |
| Neckargemund to Oirschot | 211.75 mi (340.77 km) |
| Neckargemund to Oisterwijk | 218.80 mi (352.12 km) |
| Neckargemund to Oldebroek | 245.95 mi (395.82 km) |
| Neckargemund to Oldenzaal | 217.68 mi (350.33 km) |
| Neckargemund to Ommen | 239.32 mi (385.15 km) |
| Neckargemund to Oosterend | 275.97 mi (444.12 km) |
| Neckargemund to Oosterhout | 232.58 mi (374.30 km) |
| Neckargemund to Oosterwolde | 271.11 mi (436.30 km) |
| Neckargemund to Oostzaan | 270.43 mi (435.21 km) |
| Neckargemund to Opmeer | 282.95 mi (455.37 km) |
| Neckargemund to Oss | 218.12 mi (351.03 km) |
| Neckargemund to Oud-Beijerland | 255.28 mi (410.83 km) |
| Neckargemund to Oudenbosch | 241.38 mi (388.46 km) |
| Neckargemund to Oudewater | 249.78 mi (401.98 km) |
