| Potomac to Punta Gorda (Florida) | 883.10 mi (1,421.21 km) |
| Potomac to Puyallup (Washington) | 2,309.84 mi (3,717.33 km) |
| Potomac to Queen Creek (Arizona) | 1,949.77 mi (3,137.85 km) |
| Potomac to Queens (New York) | 216.34 mi (348.17 km) |
| Potomac to Quincy (Illinois) | 758.43 mi (1,220.58 km) |
| Potomac to Quincy (Massachusetts) | 393.36 mi (633.05 km) |
| Potomac to Raceland (Louisiana) | 997.66 mi (1,605.59 km) |
| Potomac to Racine (Wisconsin) | 610.68 mi (982.79 km) |
| Potomac to Radcliff (Kentucky) | 480.19 mi (772.80 km) |
| Potomac to Radford (Virginia) | 224.84 mi (361.85 km) |
| Potomac to Rahway (New Jersey) | 189.82 mi (305.48 km) |
| Potomac to Raleigh (North Carolina) | 233.75 mi (376.19 km) |
| Potomac to Ramona (California) | 2,237.18 mi (3,600.39 km) |
| Potomac to Ramsey (Minnesota) | 935.66 mi (1,505.80 km) |
| Potomac to Ramsey (New Jersey) | 214.42 mi (345.07 km) |
