| Middelharnis to Orangevale (California) | 5,376.71 mi (8,652.97 km) |
| Middelharnis to Orchards (Washington) | 4,997.74 mi (8,043.08 km) |
| Middelharnis to Orcutt (California) | 5,579.88 mi (8,979.95 km) |
| Middelharnis to Oregon (Ohio) | 3,954.14 mi (6,363.57 km) |
| Middelharnis to Oregon (Wisconsin) | 4,114.93 mi (6,622.35 km) |
| Middelharnis to Oregon City (Oregon) | 5,019.78 mi (8,078.55 km) |
| Middelharnis to Orem (Utah) | 5,004.33 mi (8,053.69 km) |
| Middelharnis to Orinda (California) | 5,451.23 mi (8,772.90 km) |
| Middelharnis to Orland Park (Illinois) | 4,122.44 mi (6,634.43 km) |
| Middelharnis to Orlando (Florida) | 4,515.23 mi (7,266.56 km) |
| Middelharnis to Ormond Beach (Florida) | 4,463.98 mi (7,184.08 km) |
| Middelharnis to Oro Valley (Arizona) | 5,425.46 mi (8,731.43 km) |
| Middelharnis to Oroville (California) | 5,338.12 mi (8,590.88 km) |
| Middelharnis to Oshkosh (Wisconsin) | 4,032.51 mi (6,489.69 km) |
| Middelharnis to Oskaloosa (Iowa) | 4,312.43 mi (6,940.19 km) |
