| Potomac to Colton (California) | 2,235.89 mi (3,598.31 km) |
| Potomac to Columbia (Illinois) | 702.24 mi (1,130.14 km) |
| Potomac to Columbia (Maryland) | 22.11 mi (35.58 km) |
| Potomac to Columbia (Missouri) | 811.85 mi (1,306.54 km) |
| Potomac to Columbia (Pennsylvania) | 79.77 mi (128.38 km) |
| Potomac to Columbia (South Carolina) | 400.70 mi (644.86 km) |
| Potomac to Columbia (Tennessee) | 589.54 mi (948.77 km) |
| Potomac to Columbia Heights (Minnesota) | 921.09 mi (1,482.35 km) |
| Potomac to Columbine (Colorado) | 1,484.92 mi (2,389.74 km) |
| Potomac to Columbus (Georgia) | 622.00 mi (1,001.01 km) |
| Potomac to Columbus (Indiana) | 467.71 mi (752.71 km) |
| Potomac to Columbus (Mississippi) | 730.66 mi (1,175.89 km) |
| Potomac to Columbus (Nebraska) | 1,074.19 mi (1,728.75 km) |
| Potomac to Columbus (Ohio) | 315.91 mi (508.41 km) |
| Potomac to Commack (New York) | 242.69 mi (390.57 km) |
