| Chalfont Saint Peter to Oberkirch | 437.66 mi (704.34 km) |
| Chalfont Saint Peter to Obernburg am Main | 441.01 mi (709.74 km) |
| Chalfont Saint Peter to Obernkirchen | 414.28 mi (666.72 km) |
| Chalfont Saint Peter to Oberschleissheim | 586.06 mi (943.17 km) |
| Chalfont Saint Peter to Oberstdorf | 565.21 mi (909.62 km) |
| Chalfont Saint Peter to Obertraubling | 589.68 mi (949.00 km) |
| Chalfont Saint Peter to Obertshausen | 422.96 mi (680.69 km) |
| Chalfont Saint Peter to Oberursel | 409.27 mi (658.66 km) |
| Chalfont Saint Peter to Ochsenfurt | 484.32 mi (779.44 km) |
| Chalfont Saint Peter to Ochsenhausen | 527.27 mi (848.56 km) |
| Chalfont Saint Peter to Ochtrup | 332.62 mi (535.30 km) |
| Chalfont Saint Peter to Odenthal | 333.52 mi (536.75 km) |
| Chalfont Saint Peter to Oelde | 372.75 mi (599.89 km) |
| Chalfont Saint Peter to Oelsnitz | 558.41 mi (898.68 km) |
| Chalfont Saint Peter to Oer-Erkenschwick | 334.71 mi (538.67 km) |
