| Opfikon to Orangevale (California) | 5,732.35 mi (9,225.32 km) |
| Opfikon to Orchards (Washington) | 5,354.95 mi (8,617.95 km) |
| Opfikon to Orcutt (California) | 5,933.65 mi (9,549.29 km) |
| Opfikon to Oregon (Ohio) | 4,273.11 mi (6,876.91 km) |
| Opfikon to Oregon (Wisconsin) | 4,445.49 mi (7,154.32 km) |
| Opfikon to Oregon City (Oregon) | 5,376.98 mi (8,653.41 km) |
| Opfikon to Orem (Utah) | 5,355.28 mi (8,618.49 km) |
| Opfikon to Orinda (California) | 5,807.00 mi (9,345.47 km) |
| Opfikon to Orland Park (Illinois) | 4,448.16 mi (7,158.61 km) |
| Opfikon to Orlando (Florida) | 4,793.70 mi (7,714.72 km) |
| Opfikon to Ormond Beach (Florida) | 4,744.27 mi (7,635.16 km) |
| Opfikon to Oro Valley (Arizona) | 5,768.90 mi (9,284.15 km) |
| Opfikon to Oroville (California) | 5,694.13 mi (9,163.82 km) |
| Opfikon to Oshkosh (Wisconsin) | 4,364.13 mi (7,023.38 km) |
| Opfikon to Oskaloosa (Iowa) | 4,644.31 mi (7,474.29 km) |
