| Niles to Odessa (Texas) | 1,062.94 mi (1,710.63 km) |
| Niles to Ogden (Utah) | 1,244.75 mi (2,003.23 km) |
| Niles to Oildale (California) | 1,732.85 mi (2,788.75 km) |
| Niles to Ojus (Florida) | 1,192.48 mi (1,919.11 km) |
| Niles to Okemos (Michigan) | 179.58 mi (289.01 km) |
| Niles to Oklahoma City (Oklahoma) | 691.19 mi (1,112.36 km) |
| Niles to Okmulgee (Oklahoma) | 624.81 mi (1,005.54 km) |
| Niles to Olathe (Kansas) | 427.61 mi (688.17 km) |
| Niles to Old Jamestown (Missouri) | 255.84 mi (411.74 km) |
| Niles to Oldsmar (Florida) | 1,008.03 mi (1,622.27 km) |
| Niles to Olean (New York) | 480.87 mi (773.89 km) |
| Niles to Olive Branch (Mississippi) | 500.50 mi (805.47 km) |
| Niles to Olivehurst (California) | 1,771.70 mi (2,851.27 km) |
| Niles to Olney (Maryland) | 597.08 mi (960.90 km) |
| Niles to Olympia (Washington) | 1,747.06 mi (2,811.62 km) |
