| Marchena to Orbetello | 947.56 mi (1,524.96 km) |
| Marchena to Oria | 1,254.57 mi (2,019.04 km) |
| Marchena to Oristano | 775.92 mi (1,248.73 km) |
| Marchena to Orta Nova | 1,159.24 mi (1,865.62 km) |
| Marchena to Orte | 1,005.61 mi (1,618.37 km) |
| Marchena to Ortona | 1,103.92 mi (1,776.59 km) |
| Marchena to Orvieto | 996.80 mi (1,604.20 km) |
| Marchena to Orzinuovi | 969.05 mi (1,559.53 km) |
| Marchena to Osimo | 1,078.18 mi (1,735.17 km) |
| Marchena to Ospitaletto | 980.27 mi (1,577.59 km) |
| Marchena to Ostuni | 1,252.78 mi (2,016.16 km) |
| Marchena to Ottaviano | 1,091.59 mi (1,756.74 km) |
| Marchena to Ovada | 888.40 mi (1,429.74 km) |
| Marchena to Ozieri | 805.58 mi (1,296.46 km) |
| Marchena to Paceco | 982.26 mi (1,580.80 km) |
