| Sluis to Orangevale (California) | 5,377.75 mi (8,654.65 km) |
| Sluis to Orchards (Washington) | 5,002.46 mi (8,050.68 km) |
| Sluis to Orcutt (California) | 5,578.88 mi (8,978.33 km) |
| Sluis to Oregon (Ohio) | 3,938.18 mi (6,337.89 km) |
| Sluis to Oregon (Wisconsin) | 4,102.47 mi (6,602.28 km) |
| Sluis to Oregon City (Oregon) | 5,024.38 mi (8,085.96 km) |
| Sluis to Orem (Utah) | 5,001.10 mi (8,048.49 km) |
| Sluis to Orinda (California) | 5,452.45 mi (8,774.88 km) |
| Sluis to Orland Park (Illinois) | 4,108.45 mi (6,611.91 km) |
| Sluis to Orlando (Florida) | 4,490.72 mi (7,227.12 km) |
| Sluis to Ormond Beach (Florida) | 4,439.77 mi (7,145.12 km) |
| Sluis to Oro Valley (Arizona) | 5,418.11 mi (8,719.60 km) |
| Sluis to Oroville (California) | 5,339.70 mi (8,593.41 km) |
| Sluis to Oshkosh (Wisconsin) | 4,020.38 mi (6,470.18 km) |
| Sluis to Oskaloosa (Iowa) | 4,300.44 mi (6,920.89 km) |
