| Marion Oaks to Olympia Heights (Florida) | 253.46 mi (407.90 km) |
| Marion Oaks to Omaha (Nebraska) | 1,150.68 mi (1,851.84 km) |
| Marion Oaks to On Top of the World Designated Place (Florida) | 9.10 mi (14.64 km) |
| Marion Oaks to Onalaska (Wisconsin) | 1,142.37 mi (1,838.47 km) |
| Marion Oaks to Oneida (New York) | 1,037.92 mi (1,670.37 km) |
| Marion Oaks to Oneonta (New York) | 1,010.96 mi (1,626.99 km) |
| Marion Oaks to Ontario (California) | 2,103.91 mi (3,385.92 km) |
| Marion Oaks to Ontario (Oregon) | 2,170.21 mi (3,492.62 km) |
| Marion Oaks to Opa-locka (Florida) | 245.08 mi (394.42 km) |
| Marion Oaks to Opelika (Alabama) | 315.52 mi (507.79 km) |
| Marion Oaks to Opelousas (Louisiana) | 602.03 mi (968.88 km) |
| Marion Oaks to Orange (California) | 2,116.42 mi (3,406.05 km) |
| Marion Oaks to Orange (Texas) | 699.07 mi (1,125.04 km) |
| Marion Oaks to Orange City (Florida) | 55.03 mi (88.56 km) |
| Marion Oaks to Orangeburg (South Carolina) | 320.10 mi (515.15 km) |
