| Biddeford to Oberkirch | 3,616.05 mi (5,819.47 km) |
| Biddeford to Obernburg am Main | 3,619.66 mi (5,825.28 km) |
| Biddeford to Obernkirchen | 3,548.33 mi (5,710.48 km) |
| Biddeford to Oberschleissheim | 3,767.29 mi (6,062.86 km) |
| Biddeford to Oberstdorf | 3,741.78 mi (6,021.82 km) |
| Biddeford to Obertraubling | 3,768.30 mi (6,064.49 km) |
| Biddeford to Obertshausen | 3,600.55 mi (5,794.53 km) |
| Biddeford to Oberursel | 3,586.25 mi (5,771.52 km) |
| Biddeford to Ochsenfurt | 3,662.54 mi (5,894.30 km) |
| Biddeford to Ochsenhausen | 3,706.93 mi (5,965.73 km) |
| Biddeford to Ochtrup | 3,475.15 mi (5,592.71 km) |
| Biddeford to Odenthal | 3,504.26 mi (5,639.57 km) |
| Biddeford to Oelde | 3,522.80 mi (5,669.40 km) |
| Biddeford to Oelsnitz | 3,722.08 mi (5,990.10 km) |
| Biddeford to Oer-Erkenschwick | 3,492.79 mi (5,621.10 km) |
