| Zemst to Orangevale (California) | 5,424.65 mi (8,730.13 km) |
| Zemst to Orchards (Washington) | 5,047.67 mi (8,123.44 km) |
| Zemst to Orcutt (California) | 5,626.58 mi (9,055.11 km) |
| Zemst to Oregon (Ohio) | 3,988.75 mi (6,419.27 km) |
| Zemst to Oregon (Wisconsin) | 4,152.85 mi (6,683.36 km) |
| Zemst to Oregon City (Oregon) | 5,069.65 mi (8,158.81 km) |
| Zemst to Orem (Utah) | 5,049.56 mi (8,126.48 km) |
| Zemst to Orinda (California) | 5,499.28 mi (8,850.23 km) |
| Zemst to Orland Park (Illinois) | 4,158.95 mi (6,693.18 km) |
| Zemst to Orlando (Florida) | 4,540.20 mi (7,306.75 km) |
| Zemst to Ormond Beach (Florida) | 4,489.33 mi (7,224.88 km) |
| Zemst to Oro Valley (Arizona) | 5,467.68 mi (8,799.39 km) |
| Zemst to Oroville (California) | 5,386.37 mi (8,668.53 km) |
| Zemst to Oshkosh (Wisconsin) | 4,070.73 mi (6,551.20 km) |
| Zemst to Oskaloosa (Iowa) | 4,350.77 mi (7,001.89 km) |
