| Sulphur to Olivares | 4,847.80 mi (7,801.78 km) |
| Sulphur to Olivenza | 4,765.93 mi (7,670.02 km) |
| Sulphur to Olot | 5,124.36 mi (8,246.86 km) |
| Sulphur to Onate | 4,873.60 mi (7,843.30 km) |
| Sulphur to Onda | 5,063.42 mi (8,148.79 km) |
| Sulphur to Onteniente | 5,081.20 mi (8,177.40 km) |
| Sulphur to Orihuela | 5,086.86 mi (8,186.51 km) |
| Sulphur to Osuna | 4,905.71 mi (7,894.98 km) |
| Sulphur to Ourense | 4,635.61 mi (7,460.30 km) |
| Sulphur to Oviedo | 4,705.48 mi (7,572.74 km) |
| Sulphur to Paiporta | 5,072.09 mi (8,162.74 km) |
| Sulphur to Pajara | 4,671.81 mi (7,518.55 km) |
| Sulphur to Palafolls | 5,152.36 mi (8,291.92 km) |
| Sulphur to Palafrugell | 5,163.48 mi (8,309.82 km) |
| Sulphur to Palamos | 5,164.17 mi (8,310.94 km) |
