| Port Huron to Odenton (Maryland) | 403.41 mi (649.23 km) |
| Port Huron to Odessa (Texas) | 1,329.07 mi (2,138.94 km) |
| Port Huron to Ogden (Utah) | 1,510.76 mi (2,431.33 km) |
| Port Huron to Oildale (California) | 2,010.11 mi (3,234.97 km) |
| Port Huron to Ojus (Florida) | 1,183.38 mi (1,904.46 km) |
| Port Huron to Okemos (Michigan) | 101.84 mi (163.90 km) |
| Port Huron to Oklahoma City (Oklahoma) | 957.24 mi (1,540.52 km) |
| Port Huron to Okmulgee (Oklahoma) | 884.50 mi (1,423.46 km) |
| Port Huron to Olathe (Kansas) | 704.70 mi (1,134.11 km) |
| Port Huron to Old Jamestown (Missouri) | 499.42 mi (803.73 km) |
| Port Huron to Oldsmar (Florida) | 1,031.75 mi (1,660.44 km) |
| Port Huron to Olean (New York) | 213.25 mi (343.19 km) |
| Port Huron to Olive Branch (Mississippi) | 681.65 mi (1,097.01 km) |
| Port Huron to Olivehurst (California) | 2,037.99 mi (3,279.83 km) |
| Port Huron to Olney (Maryland) | 385.09 mi (619.74 km) |
