| Manassas to Orangevale (California) | 2,334.68 mi (3,757.30 km) |
| Manassas to Orchards (Washington) | 2,322.50 mi (3,737.71 km) |
| Manassas to Orcutt (California) | 2,368.65 mi (3,811.98 km) |
| Manassas to Oregon (Ohio) | 372.44 mi (599.38 km) |
| Manassas to Oregon (Wisconsin) | 685.18 mi (1,102.69 km) |
| Manassas to Oregon City (Oregon) | 2,327.46 mi (3,745.69 km) |
| Manassas to Orem (Utah) | 1,815.37 mi (2,921.56 km) |
| Manassas to Orinda (California) | 2,399.25 mi (3,861.22 km) |
| Manassas to Orland Park (Illinois) | 581.94 mi (936.55 km) |
| Manassas to Orlando (Florida) | 743.25 mi (1,196.14 km) |
| Manassas to Ormond Beach (Florida) | 684.80 mi (1,102.07 km) |
| Manassas to Oro Valley (Arizona) | 1,920.69 mi (3,091.05 km) |
| Manassas to Oroville (California) | 2,339.28 mi (3,764.71 km) |
| Manassas to Oshkosh (Wisconsin) | 679.26 mi (1,093.17 km) |
| Manassas to Oskaloosa (Iowa) | 819.87 mi (1,319.46 km) |
