| Forest Lake to Oberkirch | 4,401.89 mi (7,084.15 km) |
| Forest Lake to Obernburg am Main | 4,381.11 mi (7,050.71 km) |
| Forest Lake to Obernkirchen | 4,274.40 mi (6,878.98 km) |
| Forest Lake to Oberschleissheim | 4,535.99 mi (7,299.97 km) |
| Forest Lake to Oberstdorf | 4,529.55 mi (7,289.61 km) |
| Forest Lake to Obertraubling | 4,523.63 mi (7,280.08 km) |
| Forest Lake to Obertshausen | 4,360.57 mi (7,017.67 km) |
| Forest Lake to Oberursel | 4,345.81 mi (6,993.90 km) |
| Forest Lake to Ochsenfurt | 4,421.20 mi (7,115.24 km) |
| Forest Lake to Ochsenhausen | 4,487.92 mi (7,222.62 km) |
| Forest Lake to Ochtrup | 4,212.84 mi (6,779.91 km) |
| Forest Lake to Odenthal | 4,260.00 mi (6,855.81 km) |
| Forest Lake to Oelde | 4,260.84 mi (6,857.15 km) |
| Forest Lake to Oelsnitz | 4,457.31 mi (7,173.35 km) |
| Forest Lake to Oer-Erkenschwick | 4,238.69 mi (6,821.52 km) |
