| Idar-Oberstein to Orangevale (California) | 5,572.77 mi (8,968.50 km) |
| Idar-Oberstein to Orchards (Washington) | 5,191.84 mi (8,355.46 km) |
| Idar-Oberstein to Orcutt (California) | 5,776.49 mi (9,296.37 km) |
| Idar-Oberstein to Oregon (Ohio) | 4,142.50 mi (6,666.70 km) |
| Idar-Oberstein to Oregon (Wisconsin) | 4,307.22 mi (6,931.80 km) |
| Idar-Oberstein to Oregon City (Oregon) | 5,213.97 mi (8,391.07 km) |
| Idar-Oberstein to Orem (Utah) | 5,201.10 mi (8,370.36 km) |
| Idar-Oberstein to Orinda (California) | 5,647.22 mi (9,088.32 km) |
| Idar-Oberstein to Orland Park (Illinois) | 4,313.17 mi (6,941.37 km) |
| Idar-Oberstein to Orlando (Florida) | 4,687.69 mi (7,544.11 km) |
| Idar-Oberstein to Ormond Beach (Florida) | 4,637.19 mi (7,462.83 km) |
| Idar-Oberstein to Oro Valley (Arizona) | 5,621.27 mi (9,046.56 km) |
| Idar-Oberstein to Oroville (California) | 5,533.98 mi (8,906.08 km) |
| Idar-Oberstein to Oshkosh (Wisconsin) | 4,225.11 mi (6,799.65 km) |
| Idar-Oberstein to Oskaloosa (Iowa) | 4,505.15 mi (7,250.35 km) |
