| Chamusca to Orbetello | 1,048.06 mi (1,686.69 km) |
| Chamusca to Oria | 1,381.06 mi (2,222.60 km) |
| Chamusca to Oristano | 908.08 mi (1,461.42 km) |
| Chamusca to Orta Nova | 1,277.33 mi (2,055.67 km) |
| Chamusca to Orte | 1,107.81 mi (1,782.85 km) |
| Chamusca to Ortona | 1,209.98 mi (1,947.28 km) |
| Chamusca to Orvieto | 1,095.30 mi (1,762.72 km) |
| Chamusca to Orzinuovi | 1,025.70 mi (1,650.70 km) |
| Chamusca to Osimo | 1,169.69 mi (1,882.43 km) |
| Chamusca to Ospitaletto | 1,035.42 mi (1,666.35 km) |
| Chamusca to Ostuni | 1,377.06 mi (2,216.17 km) |
| Chamusca to Ottaviano | 1,214.42 mi (1,954.43 km) |
| Chamusca to Ovada | 950.16 mi (1,529.14 km) |
| Chamusca to Ozieri | 928.36 mi (1,494.06 km) |
| Chamusca to Paceco | 1,136.04 mi (1,828.29 km) |
