| Willmar to Oerlinghausen | 4,348.39 mi (6,998.07 km) |
| Willmar to Oestrich-Winkel | 4,413.22 mi (7,102.39 km) |
| Willmar to Offenburg | 4,479.45 mi (7,208.98 km) |
| Willmar to Oftersheim | 4,461.29 mi (7,179.74 km) |
| Willmar to Ohrdruf | 4,467.20 mi (7,189.27 km) |
| Willmar to Ohringen | 4,500.19 mi (7,242.35 km) |
| Willmar to Olbernhau | 4,559.06 mi (7,337.09 km) |
| Willmar to Olching | 4,607.99 mi (7,415.84 km) |
| Willmar to Oldenburg | 4,282.16 mi (6,891.47 km) |
| Willmar to Oldenburg in Holstein | 4,315.57 mi (6,945.24 km) |
| Willmar to Olfen | 4,316.98 mi (6,947.50 km) |
| Willmar to Olpe | 4,362.63 mi (7,020.97 km) |
| Willmar to Olsberg | 4,369.59 mi (7,032.17 km) |
| Willmar to Oranienburg | 4,458.60 mi (7,175.42 km) |
| Willmar to Ortenberg | 4,432.95 mi (7,134.15 km) |
