| Alcazar de San Juan to Orbetello | 780.26 mi (1,255.71 km) |
| Alcazar de San Juan to Oria | 1,103.75 mi (1,776.31 km) |
| Alcazar de San Juan to Oristano | 628.04 mi (1,010.73 km) |
| Alcazar de San Juan to Orta Nova | 1,002.64 mi (1,613.59 km) |
| Alcazar de San Juan to Orte | 839.43 mi (1,350.93 km) |
| Alcazar de San Juan to Ortona | 940.14 mi (1,513.01 km) |
| Alcazar de San Juan to Orvieto | 828.74 mi (1,333.73 km) |
| Alcazar de San Juan to Orzinuovi | 786.49 mi (1,265.74 km) |
| Alcazar de San Juan to Osimo | 907.26 mi (1,460.09 km) |
| Alcazar de San Juan to Ospitaletto | 797.44 mi (1,283.36 km) |
| Alcazar de San Juan to Ostuni | 1,100.44 mi (1,770.99 km) |
| Alcazar de San Juan to Ottaviano | 937.89 mi (1,509.38 km) |
| Alcazar de San Juan to Ovada | 706.66 mi (1,137.25 km) |
| Alcazar de San Juan to Ozieri | 650.82 mi (1,047.40 km) |
| Alcazar de San Juan to Paceco | 854.20 mi (1,374.71 km) |
