| Western Springs to Olivares | 4,191.35 mi (6,745.32 km) |
| Western Springs to Olivenza | 4,101.25 mi (6,600.33 km) |
| Western Springs to Olot | 4,397.87 mi (7,077.69 km) |
| Western Springs to Onate | 4,155.73 mi (6,688.00 km) |
| Western Springs to Onda | 4,363.12 mi (7,021.76 km) |
| Western Springs to Onteniente | 4,391.41 mi (7,067.29 km) |
| Western Springs to Orihuela | 4,404.46 mi (7,088.30 km) |
| Western Springs to Osuna | 4,246.84 mi (6,834.62 km) |
| Western Springs to Ourense | 3,940.15 mi (6,341.05 km) |
| Western Springs to Oviedo | 3,995.09 mi (6,429.47 km) |
| Western Springs to Paiporta | 4,376.65 mi (7,043.54 km) |
| Western Springs to Pajara | 4,147.68 mi (6,675.04 km) |
| Western Springs to Palafolls | 4,428.80 mi (7,127.46 km) |
| Western Springs to Palafrugell | 4,436.78 mi (7,140.31 km) |
| Western Springs to Palamos | 4,438.10 mi (7,142.44 km) |
