| Milford Mill to Olympia Heights (Florida) | 963.57 mi (1,550.71 km) |
| Milford Mill to Omaha (Nebraska) | 1,022.69 mi (1,645.86 km) |
| Milford Mill to On Top of the World Designated Place (Florida) | 774.09 mi (1,245.78 km) |
| Milford Mill to Onalaska (Wisconsin) | 807.89 mi (1,300.18 km) |
| Milford Mill to Oneida (New York) | 264.20 mi (425.18 km) |
| Milford Mill to Oneonta (New York) | 232.53 mi (374.23 km) |
| Milford Mill to Ontario (California) | 2,272.59 mi (3,657.37 km) |
| Milford Mill to Ontario (Oregon) | 2,078.83 mi (3,345.55 km) |
| Milford Mill to Opa-locka (Florida) | 950.64 mi (1,529.90 km) |
| Milford Mill to Opelika (Alabama) | 666.34 mi (1,072.38 km) |
| Milford Mill to Opelousas (Louisiana) | 1,057.67 mi (1,702.16 km) |
| Milford Mill to Orange (California) | 2,290.05 mi (3,685.48 km) |
| Milford Mill to Orange (Texas) | 1,153.23 mi (1,855.95 km) |
| Milford Mill to Orange City (Florida) | 764.00 mi (1,229.54 km) |
| Milford Mill to Orangeburg (South Carolina) | 464.01 mi (746.76 km) |
