| Datteln to Oestrich-Winkel | 117.83 mi (189.63 km) |
| Datteln to Offenburg | 221.77 mi (356.90 km) |
| Datteln to Oftersheim | 166.94 mi (268.66 km) |
| Datteln to Ohrdruf | 157.37 mi (253.27 km) |
| Datteln to Ohringen | 194.33 mi (312.74 km) |
| Datteln to Olbernhau | 268.35 mi (431.86 km) |
| Datteln to Olching | 296.91 mi (477.82 km) |
| Datteln to Oldenburg | 109.32 mi (175.93 km) |
| Datteln to Oldenburg in Holstein | 234.75 mi (377.79 km) |
| Datteln to Olfen | 4.69 mi (7.55 km) |
| Datteln to Olpe | 48.87 mi (78.65 km) |
| Datteln to Olsberg | 53.40 mi (85.94 km) |
| Datteln to Oranienburg | 260.86 mi (419.82 km) |
| Datteln to Ortenberg | 116.59 mi (187.63 km) |
| Datteln to Oschatz | 249.24 mi (401.12 km) |
