| Johnston to Olivares | 4,462.10 mi (7,181.05 km) |
| Johnston to Olivenza | 4,370.28 mi (7,033.29 km) |
| Johnston to Olot | 4,646.41 mi (7,477.68 km) |
| Johnston to Onate | 4,408.44 mi (7,094.69 km) |
| Johnston to Onda | 4,620.97 mi (7,436.74 km) |
| Johnston to Onteniente | 4,652.42 mi (7,487.35 km) |
| Johnston to Orihuela | 4,667.60 mi (7,511.77 km) |
| Johnston to Osuna | 4,516.80 mi (7,269.09 km) |
| Johnston to Ourense | 4,201.18 mi (6,761.15 km) |
| Johnston to Oviedo | 4,251.07 mi (6,841.43 km) |
| Johnston to Paiporta | 4,635.99 mi (7,460.91 km) |
| Johnston to Pajara | 4,440.31 mi (7,145.99 km) |
| Johnston to Palafolls | 4,678.32 mi (7,529.03 km) |
| Johnston to Palafrugell | 4,685.09 mi (7,539.92 km) |
| Johnston to Palamos | 4,686.64 mi (7,542.42 km) |
