| Elk to Olympia Heights (Florida) | 5,285.73 mi (8,506.56 km) |
| Elk to Omaha (Nebraska) | 4,923.92 mi (7,924.28 km) |
| Elk to On Top of the World Designated Place (Florida) | 5,168.14 mi (8,317.32 km) |
| Elk to Onalaska (Wisconsin) | 4,634.68 mi (7,458.80 km) |
| Elk to Oneida (New York) | 4,186.17 mi (6,737.00 km) |
| Elk to Oneonta (New York) | 4,197.76 mi (6,755.65 km) |
| Elk to Ontario (California) | 5,912.14 mi (9,514.67 km) |
| Elk to Ontario (Oregon) | 5,262.98 mi (8,469.94 km) |
| Elk to Opa-locka (Florida) | 5,272.87 mi (8,485.86 km) |
| Elk to Opelika (Alabama) | 5,077.61 mi (8,171.63 km) |
| Elk to Opelousas (Louisiana) | 5,423.02 mi (8,727.51 km) |
| Elk to Orange (California) | 5,931.89 mi (9,546.45 km) |
| Elk to Orange (Texas) | 5,500.81 mi (8,852.70 km) |
| Elk to Orange City (Florida) | 5,141.83 mi (8,274.98 km) |
| Elk to Orangeburg (South Carolina) | 4,875.44 mi (7,846.26 km) |
