| Guarda to Orbetello | 966.92 mi (1,556.11 km) |
| Guarda to Oria | 1,306.97 mi (2,103.37 km) |
| Guarda to Oristano | 840.14 mi (1,352.07 km) |
| Guarda to Orta Nova | 1,200.64 mi (1,932.24 km) |
| Guarda to Orte | 1,026.77 mi (1,652.43 km) |
| Guarda to Ortona | 1,129.52 mi (1,817.79 km) |
| Guarda to Orvieto | 1,013.17 mi (1,630.55 km) |
| Guarda to Orzinuovi | 933.18 mi (1,501.81 km) |
| Guarda to Osimo | 1,084.98 mi (1,746.10 km) |
| Guarda to Ospitaletto | 942.54 mi (1,516.87 km) |
| Guarda to Ostuni | 1,302.15 mi (2,095.61 km) |
| Guarda to Ottaviano | 1,139.89 mi (1,834.47 km) |
| Guarda to Ovada | 859.25 mi (1,382.83 km) |
| Guarda to Ozieri | 856.33 mi (1,378.12 km) |
| Guarda to Paceco | 1,075.85 mi (1,731.41 km) |
