| Preakness to Olivares | 3,560.06 mi (5,729.36 km) |
| Preakness to Olivenza | 3,475.27 mi (5,592.91 km) |
| Preakness to Olot | 3,823.93 mi (6,154.03 km) |
| Preakness to Onate | 3,573.28 mi (5,750.64 km) |
| Preakness to Onda | 3,764.95 mi (6,059.10 km) |
| Preakness to Onteniente | 3,784.63 mi (6,090.78 km) |
| Preakness to Orihuela | 3,791.97 mi (6,102.58 km) |
| Preakness to Osuna | 3,617.29 mi (5,821.47 km) |
| Preakness to Ourense | 3,337.36 mi (5,370.95 km) |
| Preakness to Oviedo | 3,405.52 mi (5,480.65 km) |
| Preakness to Paiporta | 3,774.42 mi (6,074.35 km) |
| Preakness to Pajara | 3,457.16 mi (5,563.75 km) |
| Preakness to Palafolls | 3,851.95 mi (6,199.11 km) |
| Preakness to Palafrugell | 3,863.05 mi (6,216.99 km) |
| Preakness to Palamos | 3,863.74 mi (6,218.10 km) |
