| Knightdale to Olivares | 3,909.54 mi (6,291.79 km) |
| Knightdale to Olivenza | 3,829.18 mi (6,162.47 km) |
| Knightdale to Olot | 4,205.28 mi (6,767.75 km) |
| Knightdale to Onate | 3,951.98 mi (6,360.10 km) |
| Knightdale to Onda | 4,134.52 mi (6,653.87 km) |
| Knightdale to Onteniente | 4,149.16 mi (6,677.43 km) |
| Knightdale to Orihuela | 4,152.94 mi (6,683.52 km) |
| Knightdale to Osuna | 3,967.70 mi (6,385.39 km) |
| Knightdale to Ourense | 3,706.88 mi (5,965.64 km) |
| Knightdale to Oviedo | 3,781.68 mi (6,086.03 km) |
| Knightdale to Paiporta | 4,141.66 mi (6,665.36 km) |
| Knightdale to Pajara | 3,738.78 mi (6,016.99 km) |
| Knightdale to Palafolls | 4,231.83 mi (6,810.48 km) |
| Knightdale to Palafrugell | 4,244.31 mi (6,830.55 km) |
| Knightdale to Palamos | 4,244.71 mi (6,831.20 km) |
