| West Allis to Olivares | 4,161.67 mi (6,697.56 km) |
| West Allis to Olivenza | 4,070.52 mi (6,550.87 km) |
| West Allis to Olot | 4,356.79 mi (7,011.58 km) |
| West Allis to Onate | 4,116.47 mi (6,624.81 km) |
| West Allis to Onda | 4,326.38 mi (6,962.63 km) |
| West Allis to Onteniente | 4,356.28 mi (7,010.75 km) |
| West Allis to Orihuela | 4,370.46 mi (7,033.57 km) |
| West Allis to Osuna | 4,216.69 mi (6,786.10 km) |
| West Allis to Ourense | 3,904.93 mi (6,284.37 km) |
| West Allis to Oviedo | 3,957.33 mi (6,368.71 km) |
| West Allis to Paiporta | 4,340.66 mi (6,985.62 km) |
| West Allis to Pajara | 4,136.25 mi (6,656.65 km) |
| West Allis to Palafolls | 4,388.16 mi (7,062.06 km) |
| West Allis to Palafrugell | 4,395.61 mi (7,074.05 km) |
| West Allis to Palamos | 4,397.03 mi (7,076.34 km) |
