| Walker Mill to Olivares | 3,742.90 mi (6,023.62 km) |
| Walker Mill to Olivenza | 3,659.59 mi (5,889.54 km) |
| Walker Mill to Olot | 4,017.19 mi (6,465.05 km) |
| Walker Mill to Onate | 3,765.67 mi (6,060.26 km) |
| Walker Mill to Onda | 3,954.59 mi (6,364.30 km) |
| Walker Mill to Onteniente | 3,972.67 mi (6,393.39 km) |
| Walker Mill to Orihuela | 3,978.84 mi (6,403.32 km) |
| Walker Mill to Osuna | 3,800.49 mi (6,116.29 km) |
| Walker Mill to Ourense | 3,526.79 mi (5,675.82 km) |
| Walker Mill to Oviedo | 3,597.07 mi (5,788.93 km) |
| Walker Mill to Paiporta | 3,963.33 mi (6,378.36 km) |
| Walker Mill to Pajara | 3,614.39 mi (5,816.79 km) |
| Walker Mill to Palafolls | 4,044.79 mi (6,509.45 km) |
| Walker Mill to Palafrugell | 4,056.30 mi (6,527.98 km) |
| Walker Mill to Palamos | 4,056.90 mi (6,528.95 km) |
