| Canton to Oberkirch | 4,170.62 mi (6,711.97 km) |
| Canton to Obernburg am Main | 4,167.88 mi (6,707.56 km) |
| Canton to Obernkirchen | 4,086.26 mi (6,576.20 km) |
| Canton to Oberschleissheim | 4,318.26 mi (6,949.56 km) |
| Canton to Oberstdorf | 4,297.49 mi (6,916.15 km) |
| Canton to Obertraubling | 4,315.74 mi (6,945.51 km) |
| Canton to Obertshausen | 4,148.28 mi (6,676.01 km) |
| Canton to Oberursel | 4,133.77 mi (6,652.66 km) |
| Canton to Ochsenfurt | 4,210.27 mi (6,775.77 km) |
| Canton to Ochsenhausen | 4,260.75 mi (6,857.02 km) |
| Canton to Ochtrup | 4,015.91 mi (6,462.98 km) |
| Canton to Odenthal | 4,050.24 mi (6,518.24 km) |
| Canton to Oelde | 4,063.97 mi (6,540.33 km) |
| Canton to Oelsnitz | 4,263.73 mi (6,861.81 km) |
| Canton to Oer-Erkenschwick | 4,035.98 mi (6,495.28 km) |
