| Notodden to Olympia Heights (Florida) | 4,682.95 mi (7,536.48 km) |
| Notodden to Omaha (Nebraska) | 4,285.53 mi (6,896.90 km) |
| Notodden to On Top of the World Designated Place (Florida) | 4,553.47 mi (7,328.10 km) |
| Notodden to Onalaska (Wisconsin) | 3,996.05 mi (6,431.02 km) |
| Notodden to Oneida (New York) | 3,558.97 mi (5,727.61 km) |
| Notodden to Oneonta (New York) | 3,572.50 mi (5,749.39 km) |
| Notodden to Ontario (California) | 5,291.55 mi (8,515.93 km) |
| Notodden to Ontario (Oregon) | 4,653.54 mi (7,489.15 km) |
| Notodden to Opa-locka (Florida) | 4,669.94 mi (7,515.54 km) |
| Notodden to Opelika (Alabama) | 4,451.25 mi (7,163.60 km) |
| Notodden to Opelousas (Louisiana) | 4,789.84 mi (7,708.49 km) |
| Notodden to Orange (California) | 5,311.48 mi (8,548.00 km) |
| Notodden to Orange (Texas) | 4,866.21 mi (7,831.40 km) |
| Notodden to Orange City (Florida) | 4,529.85 mi (7,290.09 km) |
| Notodden to Orangeburg (South Carolina) | 4,255.92 mi (6,849.24 km) |
