| Oviedo to Orbetello | 864.18 mi (1,390.76 km) |
| Oviedo to Oria | 1,218.74 mi (1,961.38 km) |
| Oviedo to Oristano | 781.60 mi (1,257.87 km) |
| Oviedo to Orta Nova | 1,106.56 mi (1,780.84 km) |
| Oviedo to Orte | 922.84 mi (1,485.17 km) |
| Oviedo to Ortona | 1,025.27 mi (1,650.02 km) |
| Oviedo to Orvieto | 906.06 mi (1,458.17 km) |
| Oviedo to Orzinuovi | 790.47 mi (1,272.13 km) |
| Oviedo to Osimo | 967.81 mi (1,557.55 km) |
| Oviedo to Ospitaletto | 798.15 mi (1,284.50 km) |
| Oviedo to Ostuni | 1,211.59 mi (1,949.87 km) |
| Oviedo to Ottaviano | 1,053.38 mi (1,695.25 km) |
| Oviedo to Ovada | 724.67 mi (1,166.25 km) |
| Oviedo to Ozieri | 785.29 mi (1,263.80 km) |
| Oviedo to Paceco | 1,030.37 mi (1,658.22 km) |
