| Niles to Oakley (California) | 1,802.75 mi (2,901.24 km) |
| Niles to Oakton (Virginia) | 592.98 mi (954.31 km) |
| Niles to Oakville (Missouri) | 280.51 mi (451.44 km) |
| Niles to Oatfield (Oregon) | 1,738.84 mi (2,798.40 km) |
| Niles to Ocala (Florida) | 942.45 mi (1,516.72 km) |
| Niles to Ocean Acres (New Jersey) | 723.30 mi (1,164.04 km) |
| Niles to Ocean City (New Jersey) | 717.34 mi (1,154.44 km) |
| Niles to Ocean Pines (Maryland) | 713.08 mi (1,147.59 km) |
| Niles to Ocean Pointe (Hawaii) | 4,247.50 mi (6,835.68 km) |
| Niles to Ocean Springs (Mississippi) | 804.66 mi (1,294.98 km) |
| Niles to Oceanside (California) | 1,714.54 mi (2,759.28 km) |
| Niles to Oceanside (New York) | 740.78 mi (1,192.18 km) |
| Niles to Ocoee (Florida) | 993.56 mi (1,598.97 km) |
| Niles to Oconomowoc (Wisconsin) | 81.85 mi (131.72 km) |
| Niles to Odenton (Maryland) | 617.89 mi (994.40 km) |
