| Pierre to Orbetello | 5,101.87 mi (8,210.67 km) |
| Pierre to Oria | 5,423.66 mi (8,728.53 km) |
| Pierre to Oristano | 5,132.26 mi (8,259.57 km) |
| Pierre to Orta Nova | 5,314.72 mi (8,553.21 km) |
| Pierre to Orte | 5,142.01 mi (8,275.27 km) |
| Pierre to Ortona | 5,217.24 mi (8,396.33 km) |
| Pierre to Orvieto | 5,119.42 mi (8,238.91 km) |
| Pierre to Orzinuovi | 4,911.30 mi (7,903.97 km) |
| Pierre to Osimo | 5,128.16 mi (8,252.97 km) |
| Pierre to Ospitaletto | 4,908.53 mi (7,899.52 km) |
| Pierre to Ostuni | 5,409.64 mi (8,705.98 km) |
| Pierre to Ottaviano | 5,296.97 mi (8,524.66 km) |
| Pierre to Ovada | 4,903.46 mi (7,891.36 km) |
| Pierre to Ozieri | 5,114.08 mi (8,230.32 km) |
| Pierre to Paceco | 5,374.98 mi (8,650.19 km) |
