| Rockville Centre to Olivares | 3,537.60 mi (5,693.23 km) |
| Rockville Centre to Olivenza | 3,453.34 mi (5,557.61 km) |
| Rockville Centre to Olot | 3,806.15 mi (6,125.41 km) |
| Rockville Centre to Onate | 3,554.99 mi (5,721.20 km) |
| Rockville Centre to Onda | 3,745.25 mi (6,027.40 km) |
| Rockville Centre to Onteniente | 3,764.21 mi (6,057.91 km) |
| Rockville Centre to Orihuela | 3,771.05 mi (6,068.92 km) |
| Rockville Centre to Osuna | 3,594.96 mi (5,785.54 km) |
| Rockville Centre to Ourense | 3,317.54 mi (5,339.06 km) |
| Rockville Centre to Oviedo | 3,386.76 mi (5,450.47 km) |
| Rockville Centre to Paiporta | 3,754.39 mi (6,042.10 km) |
| Rockville Centre to Pajara | 3,428.39 mi (5,517.46 km) |
| Rockville Centre to Palafolls | 3,833.92 mi (6,170.10 km) |
| Rockville Centre to Palafrugell | 3,845.26 mi (6,188.36 km) |
| Rockville Centre to Palamos | 3,845.90 mi (6,189.38 km) |
