| Smartno to Olympia Heights (Florida) | 5,193.81 mi (8,358.62 km) |
| Smartno to Omaha (Nebraska) | 5,059.25 mi (8,142.07 km) |
| Smartno to On Top of the World Designated Place (Florida) | 5,116.12 mi (8,233.60 km) |
| Smartno to Onalaska (Wisconsin) | 4,757.47 mi (7,656.40 km) |
| Smartno to Oneida (New York) | 4,204.06 mi (6,765.78 km) |
| Smartno to Oneonta (New York) | 4,206.13 mi (6,769.11 km) |
| Smartno to Ontario (California) | 6,160.10 mi (9,913.73 km) |
| Smartno to Ontario (Oregon) | 5,552.16 mi (8,935.34 km) |
| Smartno to Opa-locka (Florida) | 5,181.60 mi (8,338.98 km) |
| Smartno to Opelika (Alabama) | 5,075.20 mi (8,167.75 km) |
| Smartno to Opelousas (Louisiana) | 5,455.41 mi (8,779.64 km) |
| Smartno to Orange (California) | 6,180.40 mi (9,946.39 km) |
| Smartno to Orange (Texas) | 5,543.31 mi (8,921.10 km) |
| Smartno to Orange City (Florida) | 5,081.03 mi (8,177.13 km) |
| Smartno to Orangeburg (South Carolina) | 4,846.64 mi (7,799.91 km) |
