| Monschau to Orangevale (California) | 5,497.75 mi (8,847.77 km) |
| Monschau to Orchards (Washington) | 5,117.05 mi (8,235.10 km) |
| Monschau to Orcutt (California) | 5,701.55 mi (9,175.76 km) |
| Monschau to Oregon (Ohio) | 4,072.74 mi (6,554.45 km) |
| Monschau to Oregon (Wisconsin) | 4,235.51 mi (6,816.40 km) |
| Monschau to Oregon City (Oregon) | 5,139.16 mi (8,270.69 km) |
| Monschau to Orem (Utah) | 5,126.42 mi (8,250.17 km) |
| Monschau to Orinda (California) | 5,572.20 mi (8,967.59 km) |
| Monschau to Orland Park (Illinois) | 4,242.26 mi (6,827.26 km) |
| Monschau to Orlando (Florida) | 4,625.15 mi (7,443.46 km) |
| Monschau to Ormond Beach (Florida) | 4,574.32 mi (7,361.65 km) |
| Monschau to Oro Valley (Arizona) | 5,547.53 mi (8,927.88 km) |
| Monschau to Oroville (California) | 5,458.97 mi (8,785.36 km) |
| Monschau to Oshkosh (Wisconsin) | 4,153.23 mi (6,683.99 km) |
| Monschau to Oskaloosa (Iowa) | 4,433.22 mi (7,134.58 km) |
