| Cape Girardeau to Oerlinghausen | 4,557.67 mi (7,334.86 km) |
| Cape Girardeau to Oestrich-Winkel | 4,601.95 mi (7,406.12 km) |
| Cape Girardeau to Offenburg | 4,654.01 mi (7,489.90 km) |
| Cape Girardeau to Oftersheim | 4,646.78 mi (7,478.27 km) |
| Cape Girardeau to Ohrdruf | 4,674.65 mi (7,523.12 km) |
| Cape Girardeau to Ohringen | 4,688.08 mi (7,544.73 km) |
| Cape Girardeau to Olbernhau | 4,776.01 mi (7,686.24 km) |
| Cape Girardeau to Olching | 4,795.12 mi (7,717.00 km) |
| Cape Girardeau to Oldenburg | 4,500.43 mi (7,242.75 km) |
| Cape Girardeau to Oldenburg in Holstein | 4,554.20 mi (7,329.28 km) |
| Cape Girardeau to Olfen | 4,518.93 mi (7,272.52 km) |
| Cape Girardeau to Olpe | 4,559.94 mi (7,338.51 km) |
| Cape Girardeau to Olsberg | 4,572.54 mi (7,358.79 km) |
| Cape Girardeau to Oranienburg | 4,692.84 mi (7,552.39 km) |
| Cape Girardeau to Ortenberg | 4,629.27 mi (7,450.09 km) |
