| Fleming Island to Olympia Heights (Florida) | 313.68 mi (504.82 km) |
| Fleming Island to Omaha (Nebraska) | 1,111.91 mi (1,789.45 km) |
| Fleming Island to On Top of the World Designated Place (Florida) | 76.79 mi (123.59 km) |
| Fleming Island to Onalaska (Wisconsin) | 1,085.59 mi (1,747.08 km) |
| Fleming Island to Oneida (New York) | 956.77 mi (1,539.78 km) |
| Fleming Island to Oneonta (New York) | 929.76 mi (1,496.30 km) |
| Fleming Island to Ontario (California) | 2,108.39 mi (3,393.13 km) |
| Fleming Island to Ontario (Oregon) | 2,147.36 mi (3,455.84 km) |
| Fleming Island to Opa-locka (Florida) | 303.43 mi (488.33 km) |
| Fleming Island to Opelika (Alabama) | 279.37 mi (449.61 km) |
| Fleming Island to Opelousas (Louisiana) | 618.98 mi (996.15 km) |
| Fleming Island to Orange (California) | 2,121.54 mi (3,414.29 km) |
| Fleming Island to Orange (Texas) | 719.79 mi (1,158.39 km) |
| Fleming Island to Orange City (Florida) | 84.37 mi (135.79 km) |
| Fleming Island to Orangeburg (South Carolina) | 239.70 mi (385.75 km) |
