| Horn Lake to Olivares | 4,514.43 mi (7,265.28 km) |
| Horn Lake to Olivenza | 4,429.72 mi (7,128.95 km) |
| Horn Lake to Olot | 4,769.95 mi (7,676.49 km) |
| Horn Lake to Onate | 4,521.29 mi (7,276.32 km) |
| Horn Lake to Onda | 4,716.73 mi (7,590.85 km) |
| Horn Lake to Onteniente | 4,737.79 mi (7,624.74 km) |
| Horn Lake to Orihuela | 4,745.78 mi (7,637.59 km) |
| Horn Lake to Osuna | 4,571.71 mi (7,357.46 km) |
| Horn Lake to Ourense | 4,289.53 mi (6,903.33 km) |
| Horn Lake to Oviedo | 4,355.07 mi (7,008.82 km) |
| Horn Lake to Paiporta | 4,726.91 mi (7,607.23 km) |
| Horn Lake to Pajara | 4,383.21 mi (7,054.09 km) |
| Horn Lake to Palafolls | 4,798.85 mi (7,723.00 km) |
| Horn Lake to Palafrugell | 4,809.07 mi (7,739.45 km) |
| Horn Lake to Palamos | 4,809.95 mi (7,740.86 km) |
