| Clemmons to Olivares | 3,998.11 mi (6,434.34 km) |
| Clemmons to Olivenza | 3,916.62 mi (6,303.19 km) |
| Clemmons to Olot | 4,284.46 mi (6,895.17 km) |
| Clemmons to Onate | 4,032.03 mi (6,488.93 km) |
| Clemmons to Onda | 4,217.69 mi (6,787.72 km) |
| Clemmons to Onteniente | 4,233.86 mi (6,813.75 km) |
| Clemmons to Orihuela | 4,238.66 mi (6,821.47 km) |
| Clemmons to Osuna | 4,056.07 mi (6,527.62 km) |
| Clemmons to Ourense | 3,789.87 mi (6,099.21 km) |
| Clemmons to Oviedo | 3,862.55 mi (6,216.17 km) |
| Clemmons to Paiporta | 4,225.56 mi (6,800.38 km) |
| Clemmons to Pajara | 3,838.79 mi (6,177.93 km) |
| Clemmons to Palafolls | 4,311.56 mi (6,938.79 km) |
| Clemmons to Palafrugell | 4,323.53 mi (6,958.05 km) |
| Clemmons to Palamos | 4,324.04 mi (6,958.87 km) |
