| Fort Madison to Olivares | 4,388.22 mi (7,062.16 km) |
| Fort Madison to Olivenza | 4,298.00 mi (6,916.97 km) |
| Fort Madison to Olot | 4,591.44 mi (7,389.20 km) |
| Fort Madison to Onate | 4,350.12 mi (7,000.84 km) |
| Fort Madison to Onda | 4,558.48 mi (7,336.17 km) |
| Fort Madison to Onteniente | 4,587.27 mi (7,382.50 km) |
| Fort Madison to Orihuela | 4,600.62 mi (7,403.98 km) |
| Fort Madison to Osuna | 4,443.66 mi (7,151.38 km) |
| Fort Madison to Ourense | 4,135.96 mi (6,656.19 km) |
| Fort Madison to Oviedo | 4,190.08 mi (6,743.27 km) |
| Fort Madison to Paiporta | 4,572.26 mi (7,358.34 km) |
| Fort Madison to Pajara | 4,341.41 mi (6,986.82 km) |
| Fort Madison to Palafolls | 4,622.58 mi (7,439.32 km) |
| Fort Madison to Palafrugell | 4,630.30 mi (7,451.75 km) |
| Fort Madison to Palamos | 4,631.67 mi (7,453.96 km) |
