| Grantsville to Oakley (California) | 524.73 mi (844.47 km) |
| Grantsville to Oakton (Virginia) | 1,859.93 mi (2,993.27 km) |
| Grantsville to Oakville (Missouri) | 1,187.05 mi (1,910.37 km) |
| Grantsville to Oatfield (Oregon) | 608.46 mi (979.22 km) |
| Grantsville to Ocala (Florida) | 1,879.05 mi (3,024.03 km) |
| Grantsville to Ocean Acres (New Jersey) | 2,001.34 mi (3,220.85 km) |
| Grantsville to Ocean City (New Jersey) | 1,993.04 mi (3,207.48 km) |
| Grantsville to Ocean Pines (Maryland) | 1,981.20 mi (3,188.44 km) |
| Grantsville to Ocean Pointe (Hawaii) | 2,968.20 mi (4,776.86 km) |
| Grantsville to Ocean Springs (Mississippi) | 1,500.75 mi (2,415.22 km) |
| Grantsville to Oceanside (California) | 575.88 mi (926.79 km) |
| Grantsville to Oceanside (New York) | 2,019.97 mi (3,250.83 km) |
| Grantsville to Ocoee (Florida) | 1,933.00 mi (3,110.87 km) |
| Grantsville to Oconomowoc (Wisconsin) | 1,241.74 mi (1,998.39 km) |
| Grantsville to Odenton (Maryland) | 1,888.33 mi (3,038.97 km) |
