| Greensboro to Octeville | 3,884.42 mi (6,251.37 km) |
| Greensboro to Oignies | 4,059.73 mi (6,533.51 km) |
| Greensboro to Oissel | 4,006.93 mi (6,448.54 km) |
| Greensboro to Olivet | 4,077.27 mi (6,561.74 km) |
| Greensboro to Ollioules | 4,382.50 mi (7,052.95 km) |
| Greensboro to Olonne-sur-Mer | 3,947.70 mi (6,353.21 km) |
| Greensboro to Oloron-Sainte-Marie | 4,083.95 mi (6,572.48 km) |
| Greensboro to Onet Village | 4,199.62 mi (6,758.64 km) |
| Greensboro to Onnaing | 4,086.62 mi (6,576.78 km) |
| Greensboro to Orange | 4,306.17 mi (6,930.11 km) |
| Greensboro to Orchies | 4,069.93 mi (6,549.92 km) |
| Greensboro to Orleans | 4,076.68 mi (6,560.78 km) |
| Greensboro to Orly | 4,076.57 mi (6,560.60 km) |
| Greensboro to Ormesson-sur-Marne | 4,081.72 mi (6,568.89 km) |
| Greensboro to Orsay | 4,068.95 mi (6,548.35 km) |
