| Ashtabula to Oberkirch | 4,100.35 mi (6,598.87 km) |
| Ashtabula to Obernburg am Main | 4,096.51 mi (6,592.70 km) |
| Ashtabula to Obernkirchen | 4,013.42 mi (6,458.98 km) |
| Ashtabula to Oberschleissheim | 4,247.28 mi (6,835.34 km) |
| Ashtabula to Oberstdorf | 4,227.38 mi (6,803.31 km) |
| Ashtabula to Obertraubling | 4,244.18 mi (6,830.35 km) |
| Ashtabula to Obertshausen | 4,076.84 mi (6,561.03 km) |
| Ashtabula to Oberursel | 4,062.30 mi (6,537.64 km) |
| Ashtabula to Ochsenfurt | 4,138.80 mi (6,660.76 km) |
| Ashtabula to Ochsenhausen | 4,190.30 mi (6,743.64 km) |
| Ashtabula to Ochtrup | 3,943.48 mi (6,346.42 km) |
| Ashtabula to Odenthal | 3,978.57 mi (6,402.88 km) |
| Ashtabula to Oelde | 3,991.58 mi (6,423.83 km) |
| Ashtabula to Oelsnitz | 4,191.33 mi (6,745.30 km) |
| Ashtabula to Oer-Erkenschwick | 3,963.89 mi (6,379.26 km) |
