| Guimar to Orbetello | 1,824.01 mi (2,935.47 km) |
| Guimar to Oria | 2,098.65 mi (3,377.46 km) |
| Guimar to Oristano | 1,630.95 mi (2,624.76 km) |
| Guimar to Orta Nova | 2,015.96 mi (3,244.38 km) |
| Guimar to Orte | 1,879.79 mi (3,025.22 km) |
| Guimar to Ortona | 1,973.23 mi (3,175.60 km) |
| Guimar to Orvieto | 1,873.59 mi (3,015.25 km) |
| Guimar to Orzinuovi | 1,859.67 mi (2,992.85 km) |
| Guimar to Osimo | 1,957.84 mi (3,150.85 km) |
| Guimar to Ospitaletto | 1,870.94 mi (3,010.99 km) |
| Guimar to Ostuni | 2,099.76 mi (3,379.24 km) |
| Guimar to Ottaviano | 1,944.93 mi (3,130.07 km) |
| Guimar to Ovada | 1,778.81 mi (2,862.72 km) |
| Guimar to Ozieri | 1,668.74 mi (2,685.59 km) |
| Guimar to Paceco | 1,794.28 mi (2,887.61 km) |
