| Allouez to Oberkirch | 4,260.44 mi (6,856.51 km) |
| Allouez to Obernburg am Main | 4,245.53 mi (6,832.51 km) |
| Allouez to Obernkirchen | 4,146.78 mi (6,673.60 km) |
| Allouez to Oberschleissheim | 4,399.45 mi (7,080.23 km) |
| Allouez to Oberstdorf | 4,388.27 mi (7,062.24 km) |
| Allouez to Obertraubling | 4,390.32 mi (7,065.53 km) |
| Allouez to Obertshausen | 4,225.23 mi (6,799.84 km) |
| Allouez to Oberursel | 4,210.49 mi (6,776.13 km) |
| Allouez to Ochsenfurt | 4,286.52 mi (6,898.49 km) |
| Allouez to Ochsenhausen | 4,348.11 mi (6,997.61 km) |
| Allouez to Ochtrup | 4,082.05 mi (6,569.43 km) |
| Allouez to Odenthal | 4,125.13 mi (6,638.76 km) |
| Allouez to Oelde | 4,130.25 mi (6,647.00 km) |
| Allouez to Oelsnitz | 4,328.54 mi (6,966.11 km) |
| Allouez to Oer-Erkenschwick | 4,106.08 mi (6,608.09 km) |
