| Idar-Oberstein to Odessa (Texas) | 5,347.80 mi (8,606.45 km) |
| Idar-Oberstein to Ogden (Utah) | 5,157.21 mi (8,299.73 km) |
| Idar-Oberstein to Oildale (California) | 5,702.56 mi (9,177.38 km) |
| Idar-Oberstein to Ojus (Florida) | 4,762.67 mi (7,664.77 km) |
| Idar-Oberstein to Okemos (Michigan) | 4,131.70 mi (6,649.33 km) |
| Idar-Oberstein to Oklahoma City (Oklahoma) | 4,979.62 mi (8,013.92 km) |
| Idar-Oberstein to Okmulgee (Oklahoma) | 4,916.07 mi (7,911.64 km) |
| Idar-Oberstein to Olathe (Kansas) | 4,705.04 mi (7,572.03 km) |
| Idar-Oberstein to Old Jamestown (Missouri) | 4,538.25 mi (7,303.61 km) |
| Idar-Oberstein to Oldsmar (Florida) | 4,765.28 mi (7,668.98 km) |
| Idar-Oberstein to Olean (New York) | 3,927.98 mi (6,321.47 km) |
| Idar-Oberstein to Olive Branch (Mississippi) | 4,713.54 mi (7,585.72 km) |
| Idar-Oberstein to Olivehurst (California) | 5,558.77 mi (8,945.97 km) |
| Idar-Oberstein to Olney (Maryland) | 4,004.10 mi (6,443.97 km) |
| Idar-Oberstein to Olympia (Washington) | 5,120.59 mi (8,240.79 km) |
