| Guillena to Orbetello | 972.54 mi (1,565.16 km) |
| Guillena to Oria | 1,283.81 mi (2,066.10 km) |
| Guillena to Oristano | 805.15 mi (1,295.77 km) |
| Guillena to Orta Nova | 1,187.20 mi (1,910.61 km) |
| Guillena to Orte | 1,030.98 mi (1,659.20 km) |
| Guillena to Ortona | 1,130.05 mi (1,818.64 km) |
| Guillena to Orvieto | 1,021.59 mi (1,644.10 km) |
| Guillena to Orzinuovi | 987.26 mi (1,588.84 km) |
| Guillena to Osimo | 1,102.09 mi (1,773.65 km) |
| Guillena to Ospitaletto | 998.27 mi (1,606.57 km) |
| Guillena to Ostuni | 1,281.72 mi (2,062.73 km) |
| Guillena to Ottaviano | 1,120.11 mi (1,802.65 km) |
| Guillena to Ovada | 907.17 mi (1,459.94 km) |
| Guillena to Ozieri | 833.52 mi (1,341.42 km) |
| Guillena to Paceco | 1,014.82 mi (1,633.19 km) |
