| Weslaco to Olivares | 5,238.45 mi (8,430.47 km) |
| Weslaco to Olivenza | 5,157.77 mi (8,300.63 km) |
| Weslaco to Olot | 5,521.61 mi (8,886.17 km) |
| Weslaco to Onate | 5,270.45 mi (8,481.98 km) |
| Weslaco to Onda | 5,458.77 mi (8,785.04 km) |
| Weslaco to Onteniente | 5,475.50 mi (8,811.97 km) |
| Weslaco to Orihuela | 5,480.36 mi (8,819.78 km) |
| Weslaco to Osuna | 5,296.58 mi (8,524.02 km) |
| Weslaco to Ourense | 5,030.93 mi (8,096.49 km) |
| Weslaco to Oviedo | 5,101.94 mi (8,210.78 km) |
| Weslaco to Paiporta | 5,466.97 mi (8,798.23 km) |
| Weslaco to Pajara | 5,039.30 mi (8,109.97 km) |
| Weslaco to Palafolls | 5,549.43 mi (8,930.94 km) |
| Weslaco to Palafrugell | 5,560.72 mi (8,949.12 km) |
| Weslaco to Palamos | 5,561.38 mi (8,950.18 km) |
