| Potomac to Willow Grove (Pennsylvania) | 135.49 mi (218.04 km) |
| Potomac to Willowbrook (California) | 2,287.89 mi (3,682.00 km) |
| Potomac to Willowick (Ohio) | 288.81 mi (464.79 km) |
| Potomac to Wilmette (Illinois) | 591.67 mi (952.20 km) |
| Potomac to Wilmington (Delaware) | 101.57 mi (163.46 km) |
| Potomac to Wilmington (North Carolina) | 334.15 mi (537.76 km) |
| Potomac to Wilmington (Ohio) | 355.44 mi (572.02 km) |
| Potomac to Wilmington Island (Georgia) | 528.88 mi (851.15 km) |
| Potomac to Wilson (North Carolina) | 230.38 mi (370.77 km) |
| Potomac to Wilsonville (Oregon) | 2,342.21 mi (3,769.43 km) |
| Potomac to Wilton Manors (Florida) | 904.43 mi (1,455.53 km) |
| Potomac to Wimauma (Florida) | 835.32 mi (1,344.32 km) |
| Potomac to Winchester (Kentucky) | 384.59 mi (618.93 km) |
| Potomac to Winchester (Nevada) | 2,072.21 mi (3,334.90 km) |
| Potomac to Winchester (Virginia) | 53.71 mi (86.44 km) |
