| Gadsden to Olivares | 4,345.31 mi (6,993.11 km) |
| Gadsden to Olivenza | 4,263.41 mi (6,861.29 km) |
| Gadsden to Olot | 4,625.49 mi (7,444.01 km) |
| Gadsden to Onate | 4,373.94 mi (7,039.17 km) |
| Gadsden to Onda | 4,562.02 mi (7,341.86 km) |
| Gadsden to Onteniente | 4,579.19 mi (7,369.50 km) |
| Gadsden to Orihuela | 4,584.58 mi (7,378.17 km) |
| Gadsden to Osuna | 4,403.21 mi (7,086.28 km) |
| Gadsden to Ourense | 4,134.18 mi (6,653.31 km) |
| Gadsden to Oviedo | 4,205.20 mi (6,767.62 km) |
| Gadsden to Paiporta | 4,570.37 mi (7,355.30 km) |
| Gadsden to Pajara | 4,181.83 mi (6,730.00 km) |
| Gadsden to Palafolls | 4,653.08 mi (7,488.41 km) |
| Gadsden to Palafrugell | 4,664.60 mi (7,506.94 km) |
| Gadsden to Palamos | 4,665.20 mi (7,507.92 km) |
