| Tucson Mountains to Olivares | 5,616.12 mi (9,038.28 km) |
| Tucson Mountains to Olivenza | 5,524.27 mi (8,890.45 km) |
| Tucson Mountains to Olot | 5,789.36 mi (9,317.07 km) |
| Tucson Mountains to Onate | 5,555.18 mi (8,940.21 km) |
| Tucson Mountains to Onda | 5,770.93 mi (9,287.42 km) |
| Tucson Mountains to Onteniente | 5,804.05 mi (9,340.71 km) |
| Tucson Mountains to Orihuela | 5,820.13 mi (9,366.59 km) |
| Tucson Mountains to Osuna | 5,670.82 mi (9,126.31 km) |
| Tucson Mountains to Ourense | 5,353.09 mi (8,614.96 km) |
| Tucson Mountains to Oviedo | 5,400.25 mi (8,690.86 km) |
| Tucson Mountains to Paiporta | 5,786.79 mi (9,312.93 km) |
| Tucson Mountains to Pajara | 5,569.29 mi (8,962.90 km) |
| Tucson Mountains to Palafolls | 5,822.08 mi (9,369.72 km) |
| Tucson Mountains to Palafrugell | 5,827.75 mi (9,378.85 km) |
| Tucson Mountains to Palamos | 5,829.51 mi (9,381.69 km) |
