| Walnut Creek to Petaluma (California) | 39.62 mi (63.77 km) |
| Walnut Creek to Petersburg (Virginia) | 2,422.30 mi (3,898.31 km) |
| Walnut Creek to Pflugerville (Texas) | 1,483.37 mi (2,387.25 km) |
| Walnut Creek to Pharr (Texas) | 1,608.02 mi (2,587.86 km) |
| Walnut Creek to Phelan (California) | 347.27 mi (558.88 km) |
| Walnut Creek to Phenix City (Alabama) | 2,109.75 mi (3,395.32 km) |
| Walnut Creek to Philadelphia (Pennsylvania) | 2,495.18 mi (4,015.61 km) |
| Walnut Creek to Phillipsburg (New Jersey) | 2,483.17 mi (3,996.27 km) |
| Walnut Creek to Phoenix (Arizona) | 632.70 mi (1,018.23 km) |
| Walnut Creek to Phoenixville (Pennsylvania) | 2,473.37 mi (3,980.50 km) |
| Walnut Creek to Picayune (Mississippi) | 1,907.50 mi (3,069.83 km) |
| Walnut Creek to Pickerington (Ohio) | 2,099.29 mi (3,378.48 km) |
| Walnut Creek to Pico Rivera (California) | 349.08 mi (561.79 km) |
| Walnut Creek to Piedmont (California) | 11.75 mi (18.91 km) |
| Walnut Creek to Pierre (South Dakota) | 1,210.85 mi (1,948.68 km) |
