| Austin to Orbetello | 5,688.75 mi (9,155.16 km) |
| Austin to Oria | 6,035.39 mi (9,713.02 km) |
| Austin to Oristano | 5,673.14 mi (9,130.04 km) |
| Austin to Orta Nova | 5,920.99 mi (9,528.92 km) |
| Austin to Orte | 5,737.00 mi (9,232.81 km) |
| Austin to Ortona | 5,824.71 mi (9,373.97 km) |
| Austin to Orvieto | 5,715.27 mi (9,197.84 km) |
| Austin to Orzinuovi | 5,521.73 mi (8,886.37 km) |
| Austin to Osimo | 5,741.05 mi (9,239.32 km) |
| Austin to Ospitaletto | 5,521.50 mi (8,885.99 km) |
| Austin to Ostuni | 6,023.28 mi (9,693.53 km) |
| Austin to Ottaviano | 5,889.72 mi (9,478.59 km) |
| Austin to Ovada | 5,497.62 mi (8,847.57 km) |
| Austin to Ozieri | 5,665.51 mi (9,117.76 km) |
| Austin to Paceco | 5,923.64 mi (9,533.19 km) |
