| Poplar Bluff to Oerlinghausen | 4,617.24 mi (7,430.73 km) |
| Poplar Bluff to Oestrich-Winkel | 4,661.84 mi (7,502.51 km) |
| Poplar Bluff to Offenburg | 4,714.08 mi (7,586.59 km) |
| Poplar Bluff to Oftersheim | 4,706.73 mi (7,574.75 km) |
| Poplar Bluff to Ohrdruf | 4,734.28 mi (7,619.09 km) |
| Poplar Bluff to Ohringen | 4,748.00 mi (7,641.16 km) |
| Poplar Bluff to Olbernhau | 4,835.49 mi (7,781.97 km) |
| Poplar Bluff to Olching | 4,855.07 mi (7,813.48 km) |
| Poplar Bluff to Oldenburg | 4,559.83 mi (7,338.34 km) |
| Poplar Bluff to Oldenburg in Holstein | 4,613.19 mi (7,424.21 km) |
| Poplar Bluff to Olfen | 4,578.62 mi (7,368.58 km) |
| Poplar Bluff to Olpe | 4,619.71 mi (7,434.70 km) |
| Poplar Bluff to Olsberg | 4,632.22 mi (7,454.84 km) |
| Poplar Bluff to Oranienburg | 4,751.96 mi (7,647.53 km) |
| Poplar Bluff to Ortenberg | 4,689.06 mi (7,546.32 km) |
