| Cities | Distance |
|---|---|
| Viersen to Oria | 916.70 mi (1,475.29 km) |
| Viersen to Oristano | 791.28 mi (1,273.44 km) |
| Viersen to Orta Nova | 815.88 mi (1,313.04 km) |
| Viersen to Orte | 669.83 mi (1,077.98 km) |
| Viersen to Ortona | 721.47 mi (1,161.09 km) |
| Viersen to Orvieto | 647.97 mi (1,042.81 km) |
| Viersen to Orzinuovi | 435.88 mi (701.47 km) |
| Viersen to Osimo | 630.50 mi (1,014.69 km) |
| Viersen to Ospitaletto | 428.32 mi (689.32 km) |
| Viersen to Ostuni | 901.68 mi (1,451.11 km) |
| Viersen to Ottaviano | 815.59 mi (1,312.57 km) |
| Viersen to Ovada | 468.82 mi (754.50 km) |
| Viersen to Ozieri | 747.74 mi (1,203.38 km) |
| Viersen to Paceco | 964.84 mi (1,552.75 km) |
| Viersen to Pachino | 1,091.95 mi (1,757.32 km) |