| Humble to Oakley (California) | 1,605.07 mi (2,583.11 km) |
| Humble to Oakton (Virginia) | 1,190.72 mi (1,916.27 km) |
| Humble to Oakville (Missouri) | 648.70 mi (1,043.98 km) |
| Humble to Oatfield (Oregon) | 1,820.23 mi (2,929.38 km) |
| Humble to Ocala (Florida) | 789.55 mi (1,270.66 km) |
| Humble to Ocean Acres (New Jersey) | 1,362.16 mi (2,192.19 km) |
| Humble to Ocean City (New Jersey) | 1,333.66 mi (2,146.31 km) |
| Humble to Ocean Pines (Maryland) | 1,283.83 mi (2,066.13 km) |
| Humble to Ocean Pointe (Hawaii) | 3,908.36 mi (6,289.90 km) |
| Humble to Ocean Springs (Mississippi) | 387.93 mi (624.32 km) |
| Humble to Oceanside (California) | 1,313.61 mi (2,114.05 km) |
| Humble to Oceanside (New York) | 1,418.07 mi (2,282.17 km) |
| Humble to Ocoee (Florida) | 832.76 mi (1,340.20 km) |
| Humble to Oconomowoc (Wisconsin) | 979.66 mi (1,576.61 km) |
| Humble to Odenton (Maryland) | 1,225.47 mi (1,972.20 km) |
