| Holtsville to Olivares | 3,504.90 mi (5,640.58 km) |
| Holtsville to Olivenza | 3,420.65 mi (5,505.00 km) |
| Holtsville to Olot | 3,773.96 mi (6,073.60 km) |
| Holtsville to Onate | 3,522.71 mi (5,669.25 km) |
| Holtsville to Onda | 3,712.76 mi (5,975.11 km) |
| Holtsville to Onteniente | 3,731.63 mi (6,005.48 km) |
| Holtsville to Orihuela | 3,738.43 mi (6,016.42 km) |
| Holtsville to Osuna | 3,562.26 mi (5,732.90 km) |
| Holtsville to Ourense | 3,285.03 mi (5,286.75 km) |
| Holtsville to Oviedo | 3,354.41 mi (5,398.39 km) |
| Holtsville to Paiporta | 3,721.85 mi (5,989.74 km) |
| Holtsville to Pajara | 3,396.54 mi (5,466.20 km) |
| Holtsville to Palafolls | 3,801.68 mi (6,118.22 km) |
| Holtsville to Palafrugell | 3,813.07 mi (6,136.55 km) |
| Holtsville to Palamos | 3,813.70 mi (6,137.56 km) |
