| Illescas to Orbetello | 796.43 mi (1,281.73 km) |
| Illescas to Oria | 1,128.56 mi (1,816.25 km) |
| Illescas to Oristano | 657.15 mi (1,057.58 km) |
| Illescas to Orta Nova | 1,024.68 mi (1,649.06 km) |
| Illescas to Orte | 856.08 mi (1,377.73 km) |
| Illescas to Ortona | 957.97 mi (1,541.71 km) |
| Illescas to Orvieto | 844.05 mi (1,358.37 km) |
| Illescas to Orzinuovi | 786.56 mi (1,265.84 km) |
| Illescas to Osimo | 919.88 mi (1,480.40 km) |
| Illescas to Ospitaletto | 796.99 mi (1,282.63 km) |
| Illescas to Ostuni | 1,124.47 mi (1,809.67 km) |
| Illescas to Ottaviano | 961.85 mi (1,547.95 km) |
| Illescas to Ovada | 708.45 mi (1,140.14 km) |
| Illescas to Ozieri | 676.09 mi (1,088.07 km) |
| Illescas to Paceco | 890.03 mi (1,432.37 km) |
