| Mission to Orbetello | 5,915.14 mi (9,519.50 km) |
| Mission to Oria | 6,265.38 mi (10,083.15 km) |
| Mission to Oristano | 5,889.44 mi (9,478.14 km) |
| Mission to Orta Nova | 6,150.37 mi (9,898.07 km) |
| Mission to Orte | 5,964.90 mi (9,599.57 km) |
| Mission to Ortona | 6,054.85 mi (9,744.34 km) |
| Mission to Orvieto | 5,943.46 mi (9,565.08 km) |
| Mission to Orzinuovi | 5,754.07 mi (9,260.27 km) |
| Mission to Osimo | 5,972.78 mi (9,612.26 km) |
| Mission to Ospitaletto | 5,754.36 mi (9,260.75 km) |
| Mission to Ostuni | 6,253.74 mi (10,064.42 km) |
| Mission to Ottaviano | 6,116.31 mi (9,843.25 km) |
| Mission to Ovada | 5,726.62 mi (9,216.11 km) |
| Mission to Ozieri | 5,884.22 mi (9,469.74 km) |
| Mission to Paceco | 6,140.19 mi (9,881.67 km) |
