| Greensboro to Oerlinghausen | 4,249.42 mi (6,838.77 km) |
| Greensboro to Oestrich-Winkel | 4,276.95 mi (6,883.08 km) |
| Greensboro to Offenburg | 4,317.45 mi (6,948.27 km) |
| Greensboro to Oftersheim | 4,318.55 mi (6,950.04 km) |
| Greensboro to Ohrdruf | 4,362.86 mi (7,021.35 km) |
| Greensboro to Ohringen | 4,360.95 mi (7,018.27 km) |
| Greensboro to Olbernhau | 4,469.96 mi (7,193.71 km) |
| Greensboro to Olching | 4,465.62 mi (7,186.72 km) |
| Greensboro to Oldenburg | 4,200.42 mi (6,759.92 km) |
| Greensboro to Oldenburg in Holstein | 4,269.83 mi (6,871.63 km) |
| Greensboro to Olfen | 4,205.63 mi (6,768.31 km) |
| Greensboro to Olpe | 4,242.28 mi (6,827.29 km) |
| Greensboro to Olsberg | 4,259.05 mi (6,854.28 km) |
| Greensboro to Oranienburg | 4,402.27 mi (7,084.77 km) |
| Greensboro to Ortenberg | 4,309.61 mi (6,935.65 km) |
