| Delfzijl to Oberkirch | 335.50 mi (539.94 km) |
| Delfzijl to Obernburg am Main | 259.54 mi (417.69 km) |
| Delfzijl to Obernkirchen | 117.84 mi (189.65 km) |
| Delfzijl to Oberschleissheim | 405.52 mi (652.61 km) |
| Delfzijl to Oberstdorf | 435.15 mi (700.31 km) |
| Delfzijl to Obertraubling | 377.73 mi (607.90 km) |
| Delfzijl to Obertshausen | 240.14 mi (386.46 km) |
| Delfzijl to Oberursel | 227.60 mi (366.28 km) |
| Delfzijl to Ochsenfurt | 288.25 mi (463.90 km) |
| Delfzijl to Ochsenhausen | 386.86 mi (622.60 km) |
| Delfzijl to Ochtrup | 78.75 mi (126.74 km) |
| Delfzijl to Odenthal | 159.14 mi (256.11 km) |
| Delfzijl to Oelde | 115.85 mi (186.44 km) |
| Delfzijl to Oelsnitz | 301.13 mi (484.62 km) |
| Delfzijl to Oer-Erkenschwick | 117.69 mi (189.40 km) |
