| Harstad to Odessa (Texas) | 4,827.94 mi (7,769.81 km) |
| Harstad to Ogden (Utah) | 4,392.23 mi (7,068.61 km) |
| Harstad to Oildale (California) | 4,886.87 mi (7,864.66 km) |
| Harstad to Ojus (Florida) | 4,717.53 mi (7,592.14 km) |
| Harstad to Okemos (Michigan) | 3,760.11 mi (6,051.32 km) |
| Harstad to Oklahoma City (Oklahoma) | 4,498.48 mi (7,239.61 km) |
| Harstad to Okmulgee (Oklahoma) | 4,458.02 mi (7,174.49 km) |
| Harstad to Olathe (Kansas) | 4,224.17 mi (6,798.14 km) |
| Harstad to Old Jamestown (Missouri) | 4,131.15 mi (6,648.44 km) |
| Harstad to Oldsmar (Florida) | 4,643.87 mi (7,473.58 km) |
| Harstad to Olean (New York) | 3,663.20 mi (5,895.36 km) |
| Harstad to Olive Branch (Mississippi) | 4,367.86 mi (7,029.39 km) |
| Harstad to Olivehurst (California) | 4,680.40 mi (7,532.38 km) |
| Harstad to Olney (Maryland) | 3,813.05 mi (6,136.51 km) |
| Harstad to Olympia (Washington) | 4,167.90 mi (6,707.59 km) |
