| Circleville to Olivares | 4,019.82 mi (6,469.27 km) |
| Circleville to Olivenza | 3,933.45 mi (6,330.28 km) |
| Circleville to Olot | 4,265.05 mi (6,863.94 km) |
| Circleville to Onate | 4,017.12 mi (6,464.93 km) |
| Circleville to Onda | 4,214.70 mi (6,782.90 km) |
| Circleville to Onteniente | 4,237.28 mi (6,819.25 km) |
| Circleville to Orihuela | 4,246.45 mi (6,834.01 km) |
| Circleville to Osuna | 4,076.63 mi (6,560.70 km) |
| Circleville to Ourense | 3,788.03 mi (6,096.24 km) |
| Circleville to Oviedo | 3,851.66 mi (6,198.65 km) |
| Circleville to Paiporta | 4,225.56 mi (6,800.38 km) |
| Circleville to Pajara | 3,924.55 mi (6,315.96 km) |
| Circleville to Palafolls | 4,294.20 mi (6,910.85 km) |
| Circleville to Palafrugell | 4,304.16 mi (6,926.88 km) |
| Circleville to Palamos | 4,305.09 mi (6,928.37 km) |
