| Ciro Marina to Olympia Heights (Florida) | 5,482.54 mi (8,823.29 km) |
| Ciro Marina to Omaha (Nebraska) | 5,463.26 mi (8,792.28 km) |
| Ciro Marina to On Top of the World Designated Place (Florida) | 5,429.10 mi (8,737.30 km) |
| Ciro Marina to Onalaska (Wisconsin) | 5,158.79 mi (8,302.27 km) |
| Ciro Marina to Oneida (New York) | 4,564.48 mi (7,345.82 km) |
| Ciro Marina to Oneonta (New York) | 4,561.91 mi (7,341.68 km) |
| Ciro Marina to Ontario (California) | 6,598.25 mi (10,618.86 km) |
| Ciro Marina to Ontario (Oregon) | 6,004.58 mi (9,663.44 km) |
| Ciro Marina to Opa-locka (Florida) | 5,470.88 mi (8,804.53 km) |
| Ciro Marina to Opelika (Alabama) | 5,415.59 mi (8,715.56 km) |
| Ciro Marina to Opelousas (Louisiana) | 5,809.62 mi (9,349.68 km) |
| Ciro Marina to Orange (California) | 6,618.64 mi (10,651.67 km) |
| Ciro Marina to Orange (Texas) | 5,901.68 mi (9,497.84 km) |
| Ciro Marina to Orange City (Florida) | 5,389.44 mi (8,673.47 km) |
| Ciro Marina to Orangeburg (South Carolina) | 5,175.65 mi (8,329.40 km) |
