| Cities | Distance |
|---|---|
| Hamm to Oria | 902.80 mi (1,452.91 km) |
| Hamm to Oristano | 814.59 mi (1,310.96 km) |
| Hamm to Orta Nova | 806.72 mi (1,298.30 km) |
| Hamm to Orte | 672.21 mi (1,081.81 km) |
| Hamm to Ortona | 714.86 mi (1,150.45 km) |
| Hamm to Orvieto | 651.10 mi (1,047.84 km) |
| Hamm to Orzinuovi | 444.75 mi (715.75 km) |
| Hamm to Osimo | 624.63 mi (1,005.24 km) |
| Hamm to Ospitaletto | 435.71 mi (701.21 km) |
| Hamm to Ostuni | 887.34 mi (1,428.03 km) |
| Hamm to Ottaviano | 812.48 mi (1,307.57 km) |
| Hamm to Ovada | 488.19 mi (785.67 km) |
| Hamm to Ozieri | 768.90 mi (1,237.42 km) |
| Hamm to Paceco | 974.05 mi (1,567.57 km) |
| Hamm to Pachino | 1,093.88 mi (1,760.42 km) |