| Morgantown to Olympia Heights (Florida) | 961.65 mi (1,547.63 km) |
| Morgantown to Omaha (Nebraska) | 852.99 mi (1,372.75 km) |
| Morgantown to On Top of the World Designated Place (Florida) | 739.78 mi (1,190.56 km) |
| Morgantown to Onalaska (Wisconsin) | 649.65 mi (1,045.51 km) |
| Morgantown to Oneida (New York) | 325.20 mi (523.35 km) |
| Morgantown to Oneonta (New York) | 320.12 mi (515.18 km) |
| Morgantown to Ontario (California) | 2,102.31 mi (3,383.35 km) |
| Morgantown to Ontario (Oregon) | 1,913.84 mi (3,080.02 km) |
| Morgantown to Opa-locka (Florida) | 949.41 mi (1,527.93 km) |
| Morgantown to Opelika (Alabama) | 569.09 mi (915.87 km) |
| Morgantown to Opelousas (Louisiana) | 929.63 mi (1,496.09 km) |
| Morgantown to Orange (California) | 2,119.84 mi (3,411.55 km) |
| Morgantown to Orange (Texas) | 1,020.25 mi (1,641.94 km) |
| Morgantown to Orange City (Florida) | 743.47 mi (1,196.50 km) |
| Morgantown to Orangeburg (South Carolina) | 427.67 mi (688.27 km) |
