| Cities | Distance |
|---|---|
| Kalkar to Oria | 945.24 mi (1,521.22 km) |
| Kalkar to Oristano | 824.94 mi (1,327.61 km) |
| Kalkar to Orta Nova | 845.54 mi (1,360.76 km) |
| Kalkar to Orte | 701.63 mi (1,129.17 km) |
| Kalkar to Ortona | 751.63 mi (1,209.63 km) |
| Kalkar to Orvieto | 679.88 mi (1,094.16 km) |
| Kalkar to Orzinuovi | 468.39 mi (753.80 km) |
| Kalkar to Osimo | 660.74 mi (1,063.36 km) |
| Kalkar to Ospitaletto | 460.63 mi (741.31 km) |
| Kalkar to Ostuni | 930.09 mi (1,496.84 km) |
| Kalkar to Ottaviano | 846.53 mi (1,362.36 km) |
| Kalkar to Ovada | 502.31 mi (808.39 km) |
| Kalkar to Ozieri | 781.36 mi (1,257.48 km) |
| Kalkar to Paceco | 997.68 mi (1,605.61 km) |
| Kalkar to Pachino | 1,123.86 mi (1,808.68 km) |