| Cape Girardeau to Olivares | 4,411.29 mi (7,099.28 km) |
| Cape Girardeau to Olivenza | 4,324.59 mi (6,959.76 km) |
| Cape Girardeau to Olot | 4,649.80 mi (7,483.13 km) |
| Cape Girardeau to Onate | 4,403.23 mi (7,086.31 km) |
| Cape Girardeau to Onda | 4,603.08 mi (7,407.95 km) |
| Cape Girardeau to Onteniente | 4,626.72 mi (7,445.98 km) |
| Cape Girardeau to Orihuela | 4,636.50 mi (7,461.72 km) |
| Cape Girardeau to Osuna | 4,468.01 mi (7,190.57 km) |
| Cape Girardeau to Ourense | 4,176.92 mi (6,722.10 km) |
| Cape Girardeau to Oviedo | 4,238.81 mi (6,821.71 km) |
| Cape Girardeau to Paiporta | 4,614.46 mi (7,426.25 km) |
| Cape Girardeau to Pajara | 4,310.23 mi (6,936.64 km) |
| Cape Girardeau to Palafolls | 4,679.44 mi (7,530.84 km) |
| Cape Girardeau to Palafrugell | 4,688.88 mi (7,546.02 km) |
| Cape Girardeau to Palamos | 4,689.91 mi (7,547.69 km) |
