| Milnrow to Olympia Heights (Florida) | 4,333.06 mi (6,973.39 km) |
| Milnrow to Omaha (Nebraska) | 4,144.46 mi (6,669.86 km) |
| Milnrow to On Top of the World Designated Place (Florida) | 4,236.34 mi (6,817.74 km) |
| Milnrow to Onalaska (Wisconsin) | 3,842.33 mi (6,183.64 km) |
| Milnrow to Oneida (New York) | 3,298.46 mi (5,308.37 km) |
| Milnrow to Oneonta (New York) | 3,302.84 mi (5,315.41 km) |
| Milnrow to Ontario (California) | 5,263.03 mi (8,470.03 km) |
| Milnrow to Ontario (Oregon) | 4,674.90 mi (7,523.52 km) |
| Milnrow to Opa-locka (Florida) | 4,320.47 mi (6,953.13 km) |
| Milnrow to Opelika (Alabama) | 4,177.51 mi (6,723.05 km) |
| Milnrow to Opelousas (Louisiana) | 4,549.76 mi (7,322.12 km) |
| Milnrow to Orange (California) | 5,283.41 mi (8,502.83 km) |
| Milnrow to Orange (Texas) | 4,635.76 mi (7,460.53 km) |
| Milnrow to Orange City (Florida) | 4,204.92 mi (6,767.17 km) |
| Milnrow to Orangeburg (South Carolina) | 3,956.90 mi (6,368.01 km) |
