| Leiden to Orangevale (California) | 5,364.03 mi (8,632.57 km) |
| Leiden to Orchards (Washington) | 4,982.80 mi (8,019.04 km) |
| Leiden to Orcutt (California) | 5,568.50 mi (8,961.64 km) |
| Leiden to Oregon (Ohio) | 3,953.21 mi (6,362.08 km) |
| Leiden to Oregon (Wisconsin) | 4,111.46 mi (6,616.76 km) |
| Leiden to Oregon City (Oregon) | 5,004.91 mi (8,054.63 km) |
| Leiden to Orem (Utah) | 4,994.45 mi (8,037.78 km) |
| Leiden to Orinda (California) | 5,438.43 mi (8,752.31 km) |
| Leiden to Orland Park (Illinois) | 4,120.07 mi (6,630.61 km) |
| Leiden to Orlando (Florida) | 4,520.84 mi (7,275.59 km) |
| Leiden to Ormond Beach (Florida) | 4,469.35 mi (7,192.72 km) |
| Leiden to Oro Valley (Arizona) | 5,418.30 mi (8,719.92 km) |
| Leiden to Oroville (California) | 5,325.12 mi (8,569.95 km) |
| Leiden to Oshkosh (Wisconsin) | 4,028.80 mi (6,483.72 km) |
| Leiden to Oskaloosa (Iowa) | 4,308.60 mi (6,934.03 km) |
