| Del Rio to Olivares | 5,255.13 mi (8,457.32 km) |
| Del Rio to Olivenza | 5,170.09 mi (8,320.45 km) |
| Del Rio to Olot | 5,501.82 mi (8,854.33 km) |
| Del Rio to Onate | 5,255.06 mi (8,457.20 km) |
| Del Rio to Onda | 5,453.73 mi (8,776.93 km) |
| Del Rio to Onteniente | 5,476.19 mi (8,813.07 km) |
| Del Rio to Orihuela | 5,484.95 mi (8,827.18 km) |
| Del Rio to Osuna | 5,312.34 mi (8,549.39 km) |
| Del Rio to Ourense | 5,027.07 mi (8,090.29 km) |
| Del Rio to Oviedo | 5,090.26 mi (8,191.98 km) |
| Del Rio to Paiporta | 5,464.60 mi (8,794.42 km) |
| Del Rio to Pajara | 5,111.51 mi (8,226.18 km) |
| Del Rio to Palafolls | 5,531.44 mi (8,901.99 km) |
| Del Rio to Palafrugell | 5,540.90 mi (8,917.22 km) |
| Del Rio to Palamos | 5,541.94 mi (8,918.88 km) |
