| Manassas to Petersburg (Virginia) | 106.77 mi (171.83 km) |
| Manassas to Pflugerville (Texas) | 1,275.85 mi (2,053.29 km) |
| Manassas to Pharr (Texas) | 1,481.59 mi (2,384.39 km) |
| Manassas to Phelan (California) | 2,223.29 mi (3,578.04 km) |
| Manassas to Phenix City (Alabama) | 606.45 mi (975.99 km) |
| Manassas to Philadelphia (Pennsylvania) | 152.72 mi (245.79 km) |
| Manassas to Phillipsburg (New Jersey) | 181.53 mi (292.14 km) |
| Manassas to Phoenix (Arizona) | 1,951.31 mi (3,140.32 km) |
| Manassas to Phoenixville (Pennsylvania) | 142.04 mi (228.58 km) |
| Manassas to Picayune (Mississippi) | 894.26 mi (1,439.18 km) |
| Manassas to Pickerington (Ohio) | 293.19 mi (471.85 km) |
| Manassas to Pico Rivera (California) | 2,264.18 mi (3,643.85 km) |
| Manassas to Piedmont (California) | 2,403.02 mi (3,867.29 km) |
| Manassas to Pierre (South Dakota) | 1,238.18 mi (1,992.66 km) |
| Manassas to Pike Creek Valley (Delaware) | 117.14 mi (188.52 km) |
