| Johnstown to Olivares | 3,805.01 mi (6,123.57 km) |
| Johnstown to Olivenza | 3,719.32 mi (5,985.66 km) |
| Johnstown to Olot | 4,058.46 mi (6,531.46 km) |
| Johnstown to Onate | 3,809.26 mi (6,130.42 km) |
| Johnstown to Onda | 4,004.28 mi (6,444.27 km) |
| Johnstown to Onteniente | 4,025.60 mi (6,478.58 km) |
| Johnstown to Orihuela | 4,033.97 mi (6,492.04 km) |
| Johnstown to Osuna | 3,862.01 mi (6,215.30 km) |
| Johnstown to Ourense | 3,577.13 mi (5,756.83 km) |
| Johnstown to Oviedo | 3,642.75 mi (5,862.44 km) |
| Johnstown to Paiporta | 4,014.54 mi (6,460.78 km) |
| Johnstown to Pajara | 3,706.63 mi (5,965.24 km) |
| Johnstown to Palafolls | 4,087.11 mi (6,577.57 km) |
| Johnstown to Palafrugell | 4,097.58 mi (6,594.42 km) |
| Johnstown to Palamos | 4,098.40 mi (6,595.75 km) |
