| Elkton to Olympia Heights (Florida) | 994.15 mi (1,599.94 km) |
| Elkton to Omaha (Nebraska) | 1,067.69 mi (1,718.29 km) |
| Elkton to On Top of the World Designated Place (Florida) | 813.30 mi (1,308.88 km) |
| Elkton to Onalaska (Wisconsin) | 844.97 mi (1,359.84 km) |
| Elkton to Oneida (New York) | 239.92 mi (386.11 km) |
| Elkton to Oneonta (New York) | 200.70 mi (322.99 km) |
| Elkton to Ontario (California) | 2,321.72 mi (3,736.45 km) |
| Elkton to Ontario (Oregon) | 2,118.79 mi (3,409.86 km) |
| Elkton to Opa-locka (Florida) | 981.11 mi (1,578.95 km) |
| Elkton to Opelika (Alabama) | 716.59 mi (1,153.24 km) |
| Elkton to Opelousas (Louisiana) | 1,110.43 mi (1,787.07 km) |
| Elkton to Orange (California) | 2,339.28 mi (3,764.72 km) |
| Elkton to Orange (Texas) | 1,206.30 mi (1,941.35 km) |
| Elkton to Orange City (Florida) | 800.27 mi (1,287.91 km) |
| Elkton to Orangeburg (South Carolina) | 506.63 mi (815.35 km) |
