| Brent to Oberkirch | 4,899.76 mi (7,885.40 km) |
| Brent to Obernburg am Main | 4,905.08 mi (7,893.96 km) |
| Brent to Obernkirchen | 4,834.20 mi (7,779.89 km) |
| Brent to Oberschleissheim | 5,052.03 mi (8,130.45 km) |
| Brent to Oberstdorf | 5,024.92 mi (8,086.83 km) |
| Brent to Obertraubling | 5,053.78 mi (8,133.28 km) |
| Brent to Obertshausen | 4,886.05 mi (7,863.35 km) |
| Brent to Oberursel | 4,871.80 mi (7,840.40 km) |
| Brent to Ochsenfurt | 4,948.03 mi (7,963.08 km) |
| Brent to Ochsenhausen | 4,990.84 mi (8,031.98 km) |
| Brent to Ochtrup | 4,761.14 mi (7,662.31 km) |
| Brent to Odenthal | 4,790.03 mi (7,708.81 km) |
| Brent to Oelde | 4,808.80 mi (7,739.01 km) |
| Brent to Oelsnitz | 5,008.07 mi (8,059.71 km) |
| Brent to Oer-Erkenschwick | 4,778.75 mi (7,690.66 km) |
