| Martos to Orbetello | 864.74 mi (1,391.66 km) |
| Martos to Oria | 1,170.86 mi (1,884.31 km) |
| Martos to Oristano | 692.19 mi (1,113.98 km) |
| Martos to Orta Nova | 1,075.52 mi (1,730.88 km) |
| Martos to Orte | 922.59 mi (1,484.77 km) |
| Martos to Ortona | 1,020.60 mi (1,642.49 km) |
| Martos to Orvieto | 914.05 mi (1,471.02 km) |
| Martos to Orzinuovi | 891.38 mi (1,434.53 km) |
| Martos to Osimo | 995.87 mi (1,602.69 km) |
| Martos to Ospitaletto | 902.79 mi (1,452.91 km) |
| Martos to Ostuni | 1,169.04 mi (1,881.39 km) |
| Martos to Ottaviano | 1,007.83 mi (1,621.95 km) |
| Martos to Ovada | 810.27 mi (1,304.01 km) |
| Martos to Ozieri | 721.87 mi (1,161.74 km) |
| Martos to Paceco | 900.11 mi (1,448.59 km) |
