| Guarda to Oberkirch | 936.32 mi (1,506.87 km) |
| Guarda to Obernburg am Main | 1,024.29 mi (1,648.43 km) |
| Guarda to Obernkirchen | 1,122.57 mi (1,806.60 km) |
| Guarda to Oberschleissheim | 1,070.53 mi (1,722.85 km) |
| Guarda to Oberstdorf | 993.14 mi (1,598.30 km) |
| Guarda to Obertraubling | 1,115.40 mi (1,795.06 km) |
| Guarda to Obertshausen | 1,021.43 mi (1,643.84 km) |
| Guarda to Oberursel | 1,017.41 mi (1,637.36 km) |
| Guarda to Ochsenfurt | 1,052.73 mi (1,694.20 km) |
| Guarda to Ochsenhausen | 997.37 mi (1,605.11 km) |
| Guarda to Ochtrup | 1,058.93 mi (1,704.19 km) |
| Guarda to Odenthal | 1,002.05 mi (1,612.65 km) |
| Guarda to Oelde | 1,071.84 mi (1,724.96 km) |
| Guarda to Oelsnitz | 1,159.93 mi (1,866.72 km) |
| Guarda to Oer-Erkenschwick | 1,034.26 mi (1,664.48 km) |
