| Smithville to Oerlinghausen | 4,628.97 mi (7,449.61 km) |
| Smithville to Oestrich-Winkel | 4,683.86 mi (7,537.94 km) |
| Smithville to Offenburg | 4,743.19 mi (7,633.42 km) |
| Smithville to Oftersheim | 4,730.47 mi (7,612.95 km) |
| Smithville to Ohrdruf | 4,747.26 mi (7,639.98 km) |
| Smithville to Ohringen | 4,770.69 mi (7,677.68 km) |
| Smithville to Olbernhau | 4,844.02 mi (7,795.70 km) |
| Smithville to Olching | 4,878.46 mi (7,851.11 km) |
| Smithville to Oldenburg | 4,566.90 mi (7,349.71 km) |
| Smithville to Oldenburg in Holstein | 4,610.16 mi (7,419.33 km) |
| Smithville to Olfen | 4,593.86 mi (7,393.10 km) |
| Smithville to Olpe | 4,637.36 mi (7,463.12 km) |
| Smithville to Olsberg | 4,647.13 mi (7,478.84 km) |
| Smithville to Oranienburg | 4,751.54 mi (7,646.87 km) |
| Smithville to Ortenberg | 4,707.43 mi (7,575.87 km) |
