| Wauwatosa to Orbetello | 4,700.49 mi (7,564.70 km) |
| Wauwatosa to Oria | 5,039.58 mi (8,110.41 km) |
| Wauwatosa to Oristano | 4,703.70 mi (7,569.88 km) |
| Wauwatosa to Orta Nova | 4,926.62 mi (7,928.63 km) |
| Wauwatosa to Orte | 4,745.91 mi (7,637.81 km) |
| Wauwatosa to Ortona | 4,829.47 mi (7,772.29 km) |
| Wauwatosa to Orvieto | 4,723.75 mi (7,602.15 km) |
| Wauwatosa to Orzinuovi | 4,524.07 mi (7,280.79 km) |
| Wauwatosa to Osimo | 4,743.52 mi (7,633.96 km) |
| Wauwatosa to Ospitaletto | 4,522.96 mi (7,279.00 km) |
| Wauwatosa to Ostuni | 5,026.74 mi (8,089.75 km) |
| Wauwatosa to Ottaviano | 4,900.20 mi (7,886.11 km) |
| Wauwatosa to Ovada | 4,505.68 mi (7,251.20 km) |
| Wauwatosa to Ozieri | 4,691.47 mi (7,550.20 km) |
| Wauwatosa to Paceco | 4,952.18 mi (7,969.76 km) |
