| Guardiagrele to Oberkirch | 528.88 mi (851.15 km) |
| Guardiagrele to Obernburg am Main | 580.99 mi (935.02 km) |
| Guardiagrele to Obernkirchen | 735.04 mi (1,182.94 km) |
| Guardiagrele to Oberschleissheim | 437.38 mi (703.90 km) |
| Guardiagrele to Oberstdorf | 408.31 mi (657.11 km) |
| Guardiagrele to Obertraubling | 477.81 mi (768.97 km) |
| Guardiagrele to Obertshausen | 601.17 mi (967.49 km) |
| Guardiagrele to Oberursel | 614.80 mi (989.43 km) |
| Guardiagrele to Ochsenfurt | 551.82 mi (888.06 km) |
| Guardiagrele to Ochsenhausen | 455.78 mi (733.51 km) |
| Guardiagrele to Ochtrup | 765.11 mi (1,231.33 km) |
| Guardiagrele to Odenthal | 696.40 mi (1,120.75 km) |
| Guardiagrele to Oelde | 723.73 mi (1,164.74 km) |
| Guardiagrele to Oelsnitz | 576.03 mi (927.03 km) |
| Guardiagrele to Oer-Erkenschwick | 729.74 mi (1,174.40 km) |
