| Ingenio to Orbetello | 1,796.19 mi (2,890.69 km) |
| Ingenio to Oria | 2,063.62 mi (3,321.07 km) |
| Ingenio to Oristano | 1,599.40 mi (2,573.99 km) |
| Ingenio to Orta Nova | 1,983.28 mi (3,191.78 km) |
| Ingenio to Orte | 1,851.21 mi (2,979.24 km) |
| Ingenio to Ortona | 1,943.22 mi (3,127.31 km) |
| Ingenio to Orvieto | 1,845.74 mi (2,970.42 km) |
| Ingenio to Orzinuovi | 1,839.10 mi (2,959.75 km) |
| Ingenio to Osimo | 1,930.67 mi (3,107.11 km) |
| Ingenio to Ospitaletto | 1,850.58 mi (2,978.22 km) |
| Ingenio to Ostuni | 2,065.18 mi (3,323.59 km) |
| Ingenio to Ottaviano | 1,911.87 mi (3,076.86 km) |
| Ingenio to Ovada | 1,757.83 mi (2,828.95 km) |
| Ingenio to Ozieri | 1,638.45 mi (2,636.83 km) |
| Ingenio to Paceco | 1,756.22 mi (2,826.36 km) |
