| Willow Grove to Olivares | 3,622.98 mi (5,830.63 km) |
| Willow Grove to Olivenza | 3,538.82 mi (5,695.19 km) |
| Willow Grove to Olot | 3,891.53 mi (6,262.81 km) |
| Willow Grove to Onate | 3,640.46 mi (5,858.75 km) |
| Willow Grove to Onda | 3,830.88 mi (6,165.20 km) |
| Willow Grove to Onteniente | 3,849.84 mi (6,195.72 km) |
| Willow Grove to Orihuela | 3,856.66 mi (6,206.70 km) |
| Willow Grove to Osuna | 3,680.37 mi (5,922.99 km) |
| Willow Grove to Ourense | 3,403.17 mi (5,476.87 km) |
| Willow Grove to Oviedo | 3,472.30 mi (5,588.13 km) |
| Willow Grove to Paiporta | 3,840.02 mi (6,179.92 km) |
| Willow Grove to Pajara | 3,509.46 mi (5,647.93 km) |
| Willow Grove to Palafolls | 3,919.35 mi (6,307.58 km) |
| Willow Grove to Palafrugell | 3,930.64 mi (6,325.76 km) |
| Willow Grove to Palamos | 3,931.29 mi (6,326.81 km) |
