| Mortsel to Orangevale (California) | 5,415.65 mi (8,715.65 km) |
| Mortsel to Orchards (Washington) | 5,037.88 mi (8,107.69 km) |
| Mortsel to Orcutt (California) | 5,618.05 mi (9,041.38 km) |
| Mortsel to Oregon (Ohio) | 3,984.16 mi (6,411.88 km) |
| Mortsel to Oregon (Wisconsin) | 4,147.25 mi (6,674.36 km) |
| Mortsel to Oregon City (Oregon) | 5,059.89 mi (8,143.11 km) |
| Mortsel to Orem (Utah) | 5,041.56 mi (8,113.60 km) |
| Mortsel to Orinda (California) | 5,490.24 mi (8,835.69 km) |
| Mortsel to Orland Park (Illinois) | 4,153.79 mi (6,684.88 km) |
| Mortsel to Orlando (Florida) | 4,538.38 mi (7,303.82 km) |
| Mortsel to Ormond Beach (Florida) | 4,487.41 mi (7,221.79 km) |
| Mortsel to Oro Valley (Arizona) | 5,460.71 mi (8,788.17 km) |
| Mortsel to Oroville (California) | 5,377.26 mi (8,653.87 km) |
| Mortsel to Oshkosh (Wisconsin) | 4,065.03 mi (6,542.04 km) |
| Mortsel to Oskaloosa (Iowa) | 4,345.05 mi (6,992.67 km) |
