| Gouveia to Orbetello | 981.07 mi (1,578.88 km) |
| Gouveia to Oria | 1,321.17 mi (2,126.21 km) |
| Gouveia to Oristano | 854.23 mi (1,374.75 km) |
| Gouveia to Orta Nova | 1,214.83 mi (1,955.08 km) |
| Gouveia to Orte | 1,040.92 mi (1,675.20 km) |
| Gouveia to Ortona | 1,143.68 mi (1,840.58 km) |
| Gouveia to Orvieto | 1,027.30 mi (1,653.28 km) |
| Gouveia to Orzinuovi | 946.72 mi (1,523.61 km) |
| Gouveia to Osimo | 1,099.02 mi (1,768.70 km) |
| Gouveia to Ospitaletto | 956.04 mi (1,538.60 km) |
| Gouveia to Ostuni | 1,316.35 mi (2,118.45 km) |
| Gouveia to Ottaviano | 1,154.08 mi (1,857.31 km) |
| Gouveia to Ovada | 872.95 mi (1,404.88 km) |
| Gouveia to Ozieri | 870.49 mi (1,400.92 km) |
| Gouveia to Paceco | 1,089.72 mi (1,753.74 km) |
