| Niles to Orangevale (California) | 1,762.82 mi (2,836.99 km) |
| Niles to Orchards (Washington) | 1,734.30 mi (2,791.08 km) |
| Niles to Orcutt (California) | 1,820.46 mi (2,929.75 km) |
| Niles to Oregon (Ohio) | 226.81 mi (365.02 km) |
| Niles to Oregon (Wisconsin) | 101.60 mi (163.50 km) |
| Niles to Oregon City (Oregon) | 1,739.18 mi (2,798.94 km) |
| Niles to Orem (Utah) | 1,244.30 mi (2,002.51 km) |
| Niles to Orinda (California) | 1,830.17 mi (2,945.38 km) |
| Niles to Orland Park (Illinois) | 29.16 mi (46.93 km) |
| Niles to Orlando (Florida) | 1,004.16 mi (1,616.04 km) |
| Niles to Ormond Beach (Florida) | 955.93 mi (1,538.43 km) |
| Niles to Oro Valley (Arizona) | 1,430.57 mi (2,302.29 km) |
| Niles to Oroville (California) | 1,763.50 mi (2,838.07 km) |
| Niles to Oshkosh (Wisconsin) | 142.97 mi (230.09 km) |
| Niles to Oskaloosa (Iowa) | 254.44 mi (409.48 km) |
