| Willmar to Oberkirch | 4,481.67 mi (7,212.55 km) |
| Willmar to Obernburg am Main | 4,459.05 mi (7,176.15 km) |
| Willmar to Obernkirchen | 4,349.87 mi (7,000.44 km) |
| Willmar to Oberschleissheim | 4,614.13 mi (7,425.72 km) |
| Willmar to Oberstdorf | 4,609.20 mi (7,417.78 km) |
| Willmar to Obertraubling | 4,600.75 mi (7,404.20 km) |
| Willmar to Obertshausen | 4,438.46 mi (7,143.01 km) |
| Willmar to Oberursel | 4,423.70 mi (7,119.25 km) |
| Willmar to Ochsenfurt | 4,498.83 mi (7,240.17 km) |
| Willmar to Ochsenhausen | 4,567.13 mi (7,350.09 km) |
| Willmar to Ochtrup | 4,289.38 mi (6,903.09 km) |
| Willmar to Odenthal | 4,337.82 mi (6,981.04 km) |
| Willmar to Oelde | 4,337.28 mi (6,980.17 km) |
| Willmar to Oelsnitz | 4,533.01 mi (7,295.18 km) |
| Willmar to Oer-Erkenschwick | 4,315.80 mi (6,945.61 km) |
