| Arenys de Mar to Orbetello | 448.42 mi (721.67 km) |
| Arenys de Mar to Oria | 788.55 mi (1,269.05 km) |
| Arenys de Mar to Oristano | 336.69 mi (541.85 km) |
| Arenys de Mar to Orta Nova | 681.08 mi (1,096.09 km) |
| Arenys de Mar to Orte | 508.21 mi (817.88 km) |
| Arenys de Mar to Ortona | 610.57 mi (982.62 km) |
| Arenys de Mar to Orvieto | 495.69 mi (797.73 km) |
| Arenys de Mar to Orzinuovi | 454.18 mi (730.92 km) |
| Arenys de Mar to Osimo | 571.48 mi (919.70 km) |
| Arenys de Mar to Ospitaletto | 465.72 mi (749.51 km) |
| Arenys de Mar to Ostuni | 783.22 mi (1,260.48 km) |
| Arenys de Mar to Ottaviano | 621.47 mi (1,000.15 km) |
| Arenys de Mar to Ovada | 372.89 mi (600.11 km) |
| Arenys de Mar to Ozieri | 342.97 mi (551.95 km) |
| Arenys de Mar to Paceco | 585.79 mi (942.74 km) |
