| Port Huron to Oakleaf Plantation (Florida) | 885.94 mi (1,425.78 km) |
| Port Huron to Oakley (California) | 2,072.22 mi (3,334.91 km) |
| Port Huron to Oakton (Virginia) | 389.58 mi (626.97 km) |
| Port Huron to Oakville (Missouri) | 517.78 mi (833.29 km) |
| Port Huron to Oatfield (Oregon) | 1,975.47 mi (3,179.22 km) |
| Port Huron to Ocala (Florida) | 953.90 mi (1,535.16 km) |
| Port Huron to Ocean Acres (New Jersey) | 478.31 mi (769.77 km) |
| Port Huron to Ocean City (New Jersey) | 481.57 mi (775.01 km) |
| Port Huron to Ocean Pines (Maryland) | 496.43 mi (798.93 km) |
| Port Huron to Ocean Pointe (Hawaii) | 4,513.75 mi (7,264.18 km) |
| Port Huron to Ocean Springs (Mississippi) | 936.51 mi (1,507.16 km) |
| Port Huron to Oceanside (California) | 1,995.21 mi (3,210.99 km) |
| Port Huron to Oceanside (New York) | 481.23 mi (774.47 km) |
| Port Huron to Ocoee (Florida) | 996.39 mi (1,603.54 km) |
| Port Huron to Oconomowoc (Wisconsin) | 305.86 mi (492.23 km) |
