| Elk River to Olympia Heights (Florida) | 1,540.78 mi (2,479.65 km) |
| Elk River to Omaha (Nebraska) | 307.62 mi (495.07 km) |
| Elk River to On Top of the World Designated Place (Florida) | 1,278.48 mi (2,057.52 km) |
| Elk River to Onalaska (Wisconsin) | 153.00 mi (246.22 km) |
| Elk River to Oneida (New York) | 898.45 mi (1,445.92 km) |
| Elk River to Oneonta (New York) | 940.10 mi (1,512.94 km) |
| Elk River to Ontario (California) | 1,488.77 mi (2,395.95 km) |
| Elk River to Ontario (Oregon) | 1,149.54 mi (1,850.00 km) |
| Elk River to Opa-locka (Florida) | 1,532.02 mi (2,465.55 km) |
| Elk River to Opelika (Alabama) | 978.42 mi (1,574.62 km) |
| Elk River to Opelousas (Louisiana) | 1,026.16 mi (1,651.44 km) |
| Elk River to Orange (California) | 1,508.60 mi (2,427.86 km) |
| Elk River to Orange (Texas) | 1,050.88 mi (1,691.23 km) |
| Elk River to Orange City (Florida) | 1,315.96 mi (2,117.83 km) |
| Elk River to Orangeburg (South Carolina) | 1,059.69 mi (1,705.41 km) |
