| Brent to Orbetello | 5,223.75 mi (8,406.81 km) |
| Brent to Oria | 5,578.15 mi (8,977.16 km) |
| Brent to Oristano | 5,185.14 mi (8,344.68 km) |
| Brent to Orta Nova | 5,462.62 mi (8,791.24 km) |
| Brent to Orte | 5,275.55 mi (8,490.17 km) |
| Brent to Ortona | 5,368.62 mi (8,639.96 km) |
| Brent to Orvieto | 5,254.65 mi (8,456.54 km) |
| Brent to Orzinuovi | 5,072.55 mi (8,163.48 km) |
| Brent to Osimo | 5,289.41 mi (8,512.49 km) |
| Brent to Ospitaletto | 5,073.75 mi (8,165.42 km) |
| Brent to Ostuni | 5,567.30 mi (8,959.70 km) |
| Brent to Ottaviano | 5,424.52 mi (8,729.92 km) |
| Brent to Ovada | 5,039.83 mi (8,110.82 km) |
| Brent to Ozieri | 5,182.75 mi (8,340.84 km) |
| Brent to Paceco | 5,435.48 mi (8,747.56 km) |
