| Merksem to Obernburg am Main | 227.95 mi (366.85 km) |
| Merksem to Obernkirchen | 212.10 mi (341.35 km) |
| Merksem to Oberschleissheim | 379.16 mi (610.20 km) |
| Merksem to Oberstdorf | 372.94 mi (600.19 km) |
| Merksem to Obertraubling | 376.53 mi (605.97 km) |
| Merksem to Obertshausen | 208.80 mi (336.03 km) |
| Merksem to Oberursel | 194.59 mi (313.17 km) |
| Merksem to Ochsenfurt | 270.78 mi (435.77 km) |
| Merksem to Ochsenhausen | 329.47 mi (530.23 km) |
| Merksem to Ochtrup | 135.14 mi (217.49 km) |
| Merksem to Odenthal | 116.87 mi (188.09 km) |
| Merksem to Oelde | 164.50 mi (264.73 km) |
| Merksem to Oelsnitz | 341.77 mi (550.03 km) |
| Merksem to Oer-Erkenschwick | 124.09 mi (199.70 km) |
| Merksem to Oerlinghausen | 188.06 mi (302.65 km) |
