| Holt to Olivares | 4,010.44 mi (6,454.18 km) |
| Holt to Olivenza | 3,920.64 mi (6,309.65 km) |
| Holt to Olot | 4,221.91 mi (6,794.51 km) |
| Holt to Onate | 3,978.71 mi (6,403.12 km) |
| Holt to Onda | 4,184.74 mi (6,734.69 km) |
| Holt to Onteniente | 4,212.30 mi (6,779.04 km) |
| Holt to Orihuela | 4,224.90 mi (6,799.31 km) |
| Holt to Osuna | 4,066.05 mi (6,543.67 km) |
| Holt to Ourense | 3,761.14 mi (6,052.97 km) |
| Holt to Oviedo | 3,817.28 mi (6,143.31 km) |
| Holt to Paiporta | 4,197.92 mi (6,755.90 km) |
| Holt to Pajara | 3,967.19 mi (6,384.57 km) |
| Holt to Palafolls | 4,252.54 mi (6,843.81 km) |
| Holt to Palafrugell | 4,260.87 mi (6,857.20 km) |
| Holt to Palamos | 4,262.12 mi (6,859.22 km) |
