| Potomac to Norton (Ohio) | 273.58 mi (440.28 km) |
| Potomac to Norton Shores (Michigan) | 551.45 mi (887.48 km) |
| Potomac to Norwalk (California) | 2,280.06 mi (3,669.40 km) |
| Potomac to Norwalk (Connecticut) | 246.66 mi (396.96 km) |
| Potomac to Norwalk (Iowa) | 885.14 mi (1,424.50 km) |
| Potomac to Norwalk (Ohio) | 324.81 mi (522.74 km) |
| Potomac to Norwich (Connecticut) | 321.04 mi (516.66 km) |
| Potomac to Norwood (Ohio) | 389.33 mi (626.57 km) |
| Potomac to Novato (California) | 2,426.11 mi (3,904.44 km) |
| Potomac to Novi (Michigan) | 407.10 mi (655.16 km) |
| Potomac to O'Fallon (Illinois) | 684.95 mi (1,102.33 km) |
| Potomac to O'Fallon (Missouri) | 726.67 mi (1,169.46 km) |
| Potomac to Oak Creek (Wisconsin) | 618.69 mi (995.69 km) |
| Potomac to Oak Forest (Illinois) | 583.94 mi (939.76 km) |
| Potomac to Oak Grove (Oregon) | 2,334.96 mi (3,757.76 km) |
