| Galveston to Oakley (California) | 1,648.97 mi (2,653.76 km) |
| Galveston to Oakton (Virginia) | 1,203.74 mi (1,937.23 km) |
| Galveston to Oakville (Missouri) | 687.37 mi (1,106.21 km) |
| Galveston to Oatfield (Oregon) | 1,872.03 mi (3,012.74 km) |
| Galveston to Ocala (Florida) | 767.94 mi (1,235.88 km) |
| Galveston to Ocean Acres (New Jersey) | 1,374.46 mi (2,211.98 km) |
| Galveston to Ocean City (New Jersey) | 1,345.01 mi (2,164.58 km) |
| Galveston to Ocean Pines (Maryland) | 1,293.27 mi (2,081.31 km) |
| Galveston to Ocean Pointe (Hawaii) | 3,937.20 mi (6,336.32 km) |
| Galveston to Ocean Springs (Mississippi) | 374.56 mi (602.80 km) |
| Galveston to Oceanside (California) | 1,349.73 mi (2,172.18 km) |
| Galveston to Oceanside (New York) | 1,432.03 mi (2,304.62 km) |
| Galveston to Ocoee (Florida) | 808.79 mi (1,301.62 km) |
| Galveston to Oconomowoc (Wisconsin) | 1,020.54 mi (1,642.41 km) |
| Galveston to Odenton (Maryland) | 1,238.32 mi (1,992.89 km) |
