| Grantsville to Orangevale (California) | 483.55 mi (778.20 km) |
| Grantsville to Orchards (Washington) | 615.45 mi (990.46 km) |
| Grantsville to Orcutt (California) | 587.76 mi (945.90 km) |
| Grantsville to Oregon (Ohio) | 1,506.06 mi (2,423.77 km) |
| Grantsville to Oregon (Wisconsin) | 1,196.61 mi (1,925.75 km) |
| Grantsville to Oregon City (Oregon) | 606.00 mi (975.27 km) |
| Grantsville to Orem (Utah) | 46.40 mi (74.67 km) |
| Grantsville to Orinda (California) | 552.02 mi (888.39 km) |
| Grantsville to Orland Park (Illinois) | 1,278.92 mi (2,058.22 km) |
| Grantsville to Orlando (Florida) | 1,946.83 mi (3,133.12 km) |
| Grantsville to Ormond Beach (Florida) | 1,927.82 mi (3,102.52 km) |
| Grantsville to Oro Valley (Arizona) | 572.23 mi (920.91 km) |
| Grantsville to Oroville (California) | 486.39 mi (782.78 km) |
| Grantsville to Oshkosh (Wisconsin) | 1,239.70 mi (1,995.10 km) |
| Grantsville to Oskaloosa (Iowa) | 1,033.96 mi (1,663.99 km) |
