| Arouca to Oberkirch | 955.05 mi (1,537.01 km) |
| Arouca to Obernburg am Main | 1,040.11 mi (1,673.89 km) |
| Arouca to Obernkirchen | 1,131.41 mi (1,820.83 km) |
| Arouca to Oberschleissheim | 1,093.62 mi (1,760.01 km) |
| Arouca to Oberstdorf | 1,017.80 mi (1,638.00 km) |
| Arouca to Obertraubling | 1,136.85 mi (1,829.58 km) |
| Arouca to Obertshausen | 1,036.19 mi (1,667.58 km) |
| Arouca to Oberursel | 1,031.42 mi (1,659.92 km) |
| Arouca to Ochsenfurt | 1,070.18 mi (1,722.28 km) |
| Arouca to Ochsenhausen | 1,019.62 mi (1,640.92 km) |
| Arouca to Ochtrup | 1,065.27 mi (1,714.39 km) |
| Arouca to Odenthal | 1,011.55 mi (1,627.94 km) |
| Arouca to Oelde | 1,080.57 mi (1,739.00 km) |
| Arouca to Oelsnitz | 1,177.23 mi (1,894.57 km) |
| Arouca to Oer-Erkenschwick | 1,042.22 mi (1,677.29 km) |
