| West Monroe to Orbetello | 5,344.94 mi (8,601.86 km) |
| West Monroe to Oria | 5,694.25 mi (9,164.02 km) |
| West Monroe to Oristano | 5,323.13 mi (8,566.75 km) |
| West Monroe to Orta Nova | 5,579.38 mi (8,979.15 km) |
| West Monroe to Orte | 5,394.27 mi (8,681.24 km) |
| West Monroe to Ortona | 5,483.65 mi (8,825.09 km) |
| West Monroe to Orvieto | 5,372.75 mi (8,646.60 km) |
| West Monroe to Orzinuovi | 5,182.34 mi (8,340.17 km) |
| West Monroe to Osimo | 5,401.21 mi (8,692.40 km) |
| West Monroe to Ospitaletto | 5,182.54 mi (8,340.49 km) |
| West Monroe to Ostuni | 5,682.50 mi (9,145.10 km) |
| West Monroe to Ottaviano | 5,546.09 mi (8,925.58 km) |
| West Monroe to Ovada | 5,155.65 mi (8,297.22 km) |
| West Monroe to Ozieri | 5,316.84 mi (8,556.63 km) |
| West Monroe to Paceco | 5,573.83 mi (8,970.22 km) |
