| Webster Groves to Petaluma (California) | 1,738.20 mi (2,797.36 km) |
| Webster Groves to Petersburg (Virginia) | 712.61 mi (1,146.83 km) |
| Webster Groves to Pflugerville (Texas) | 696.70 mi (1,121.24 km) |
| Webster Groves to Pharr (Texas) | 971.26 mi (1,563.09 km) |
| Webster Groves to Phelan (California) | 1,529.94 mi (2,462.19 km) |
| Webster Groves to Phenix City (Alabama) | 518.50 mi (834.45 km) |
| Webster Groves to Philadelphia (Pennsylvania) | 818.71 mi (1,317.59 km) |
| Webster Groves to Phillipsburg (New Jersey) | 819.17 mi (1,318.33 km) |
| Webster Groves to Phoenix (Arizona) | 1,258.76 mi (2,025.79 km) |
| Webster Groves to Phoenixville (Pennsylvania) | 798.69 mi (1,285.37 km) |
| Webster Groves to Picayune (Mississippi) | 557.85 mi (897.77 km) |
| Webster Groves to Pickerington (Ohio) | 415.71 mi (669.01 km) |
| Webster Groves to Pico Rivera (California) | 1,570.60 mi (2,527.63 km) |
| Webster Groves to Piedmont (California) | 1,722.74 mi (2,772.49 km) |
| Webster Groves to Pierre (South Dakota) | 651.93 mi (1,049.19 km) |
