| Southlake to Orbetello | 5,534.11 mi (8,906.29 km) |
| Southlake to Oria | 5,878.27 mi (9,460.16 km) |
| Southlake to Oristano | 5,524.68 mi (8,891.11 km) |
| Southlake to Orta Nova | 5,764.33 mi (9,276.80 km) |
| Southlake to Orte | 5,581.41 mi (8,982.41 km) |
| Southlake to Ortona | 5,667.68 mi (9,121.25 km) |
| Southlake to Orvieto | 5,559.51 mi (8,947.17 km) |
| Southlake to Orzinuovi | 5,363.64 mi (8,631.95 km) |
| Southlake to Osimo | 5,583.13 mi (8,985.17 km) |
| Southlake to Ospitaletto | 5,363.08 mi (8,631.04 km) |
| Southlake to Ostuni | 5,865.88 mi (9,440.22 km) |
| Southlake to Ottaviano | 5,734.78 mi (9,229.23 km) |
| Southlake to Ovada | 5,341.58 mi (8,596.44 km) |
| Southlake to Ozieri | 5,515.58 mi (8,876.47 km) |
| Southlake to Paceco | 5,774.76 mi (9,293.59 km) |
