| Cities | Distance |
|---|---|
| Hamm to Oegstgeest | 146.82 mi (236.29 km) |
| Hamm to Oirschot | 108.76 mi (175.04 km) |
| Hamm to Oisterwijk | 112.43 mi (180.93 km) |
| Hamm to Oldebroek | 97.12 mi (156.31 km) |
| Hamm to Oldenzaal | 57.68 mi (92.83 km) |
| Hamm to Ommen | 82.74 mi (133.16 km) |
| Hamm to Oosterend | 117.38 mi (188.91 km) |
| Hamm to Oosterhout | 126.87 mi (204.18 km) |
| Hamm to Oosterwolde | 110.91 mi (178.49 km) |
| Hamm to Oostzaan | 134.95 mi (217.18 km) |
| Hamm to Opmeer | 140.26 mi (225.73 km) |
| Hamm to Oss | 98.60 mi (158.68 km) |
| Hamm to Oud-Beijerland | 146.43 mi (235.65 km) |
| Hamm to Oudenbosch | 141.34 mi (227.47 km) |
| Hamm to Oudewater | 127.99 mi (205.98 km) |