| Calheta to Orbetello | 1,682.31 mi (2,707.42 km) |
| Calheta to Oria | 1,989.10 mi (3,201.14 km) |
| Calheta to Oristano | 1,510.99 mi (2,431.70 km) |
| Calheta to Orta Nova | 1,895.31 mi (3,050.20 km) |
| Calheta to Orte | 1,740.82 mi (2,801.59 km) |
| Calheta to Ortona | 1,839.83 mi (2,960.92 km) |
| Calheta to Orvieto | 1,731.28 mi (2,786.23 km) |
| Calheta to Orzinuovi | 1,684.89 mi (2,711.57 km) |
| Calheta to Osimo | 1,811.16 mi (2,914.78 km) |
| Calheta to Ospitaletto | 1,695.19 mi (2,728.14 km) |
| Calheta to Ostuni | 1,987.80 mi (3,199.06 km) |
| Calheta to Ottaviano | 1,827.21 mi (2,940.62 km) |
| Calheta to Ovada | 1,606.97 mi (2,586.17 km) |
| Calheta to Ozieri | 1,541.73 mi (2,481.18 km) |
| Calheta to Paceco | 1,705.78 mi (2,745.20 km) |
