| Cape Girardeau to Octeville | 4,234.11 mi (6,814.15 km) |
| Cape Girardeau to Oignies | 4,392.93 mi (7,069.74 km) |
| Cape Girardeau to Oissel | 4,353.12 mi (7,005.67 km) |
| Cape Girardeau to Olivet | 4,432.91 mi (7,134.08 km) |
| Cape Girardeau to Ollioules | 4,761.45 mi (7,662.81 km) |
| Cape Girardeau to Olonne-sur-Mer | 4,321.36 mi (6,954.56 km) |
| Cape Girardeau to Oloron-Sainte-Marie | 4,478.55 mi (7,207.53 km) |
| Cape Girardeau to Onet Village | 4,578.63 mi (7,368.59 km) |
| Cape Girardeau to Onnaing | 4,419.11 mi (7,111.86 km) |
| Cape Girardeau to Orange | 4,681.18 mi (7,533.62 km) |
| Cape Girardeau to Orchies | 4,402.53 mi (7,085.18 km) |
| Cape Girardeau to Orleans | 4,432.00 mi (7,132.62 km) |
| Cape Girardeau to Orly | 4,424.45 mi (7,120.47 km) |
| Cape Girardeau to Ormesson-sur-Marne | 4,428.95 mi (7,127.71 km) |
| Cape Girardeau to Orsay | 4,417.65 mi (7,109.52 km) |
