| Weslaco to Orbetello | 5,902.68 mi (9,499.45 km) |
| Weslaco to Oria | 6,253.25 mi (10,063.63 km) |
| Weslaco to Oristano | 5,876.05 mi (9,456.59 km) |
| Weslaco to Orta Nova | 6,138.19 mi (9,878.47 km) |
| Weslaco to Orte | 5,952.58 mi (9,579.76 km) |
| Weslaco to Ortona | 6,042.76 mi (9,724.88 km) |
| Weslaco to Orvieto | 5,931.19 mi (9,545.32 km) |
| Weslaco to Orzinuovi | 5,742.23 mi (9,241.23 km) |
| Weslaco to Osimo | 5,960.86 mi (9,593.08 km) |
| Weslaco to Ospitaletto | 5,742.59 mi (9,241.80 km) |
| Weslaco to Ostuni | 6,241.66 mi (10,044.98 km) |
| Weslaco to Ottaviano | 6,103.85 mi (9,823.20 km) |
| Weslaco to Ovada | 5,714.45 mi (9,196.52 km) |
| Weslaco to Ozieri | 5,871.04 mi (9,448.53 km) |
| Weslaco to Paceco | 6,126.79 mi (9,860.11 km) |
