| Knightdale to Octeville | 3,841.16 mi (6,181.75 km) |
| Knightdale to Oignies | 4,018.83 mi (6,467.68 km) |
| Knightdale to Oissel | 3,964.06 mi (6,379.54 km) |
| Knightdale to Olivet | 4,032.82 mi (6,490.20 km) |
| Knightdale to Ollioules | 4,334.00 mi (6,974.91 km) |
| Knightdale to Olonne-sur-Mer | 3,900.55 mi (6,277.33 km) |
| Knightdale to Oloron-Sainte-Marie | 4,033.29 mi (6,490.95 km) |
| Knightdale to Onet Village | 4,151.32 mi (6,680.91 km) |
| Knightdale to Onnaing | 4,045.79 mi (6,511.07 km) |
| Knightdale to Orange | 4,258.39 mi (6,853.21 km) |
| Knightdale to Orchies | 4,029.11 mi (6,484.22 km) |
| Knightdale to Orleans | 4,032.27 mi (6,489.31 km) |
| Knightdale to Orly | 4,033.34 mi (6,491.03 km) |
| Knightdale to Ormesson-sur-Marne | 4,038.58 mi (6,499.47 km) |
| Knightdale to Orsay | 4,025.60 mi (6,478.58 km) |
