| Potomac to Iver | 3,650.46 mi (5,874.84 km) |
| Potomac to Ivybridge | 3,532.79 mi (5,685.47 km) |
| Potomac to Jarrow | 3,542.44 mi (5,701.01 km) |
| Potomac to Johnstone | 3,413.65 mi (5,493.74 km) |
| Potomac to Kearsley | 3,534.88 mi (5,688.84 km) |
| Potomac to Keighley | 3,546.65 mi (5,707.78 km) |
| Potomac to Kempston | 3,638.07 mi (5,854.91 km) |
| Potomac to Kendal | 3,505.69 mi (5,641.87 km) |
| Potomac to Kenilworth | 3,590.20 mi (5,777.87 km) |
| Potomac to Kenley | 3,671.54 mi (5,908.78 km) |
| Potomac to Kensington | 3,663.84 mi (5,896.39 km) |
| Potomac to Kenton | 3,657.08 mi (5,885.51 km) |
| Potomac to Kettering | 3,623.07 mi (5,830.77 km) |
| Potomac to Kew Green | 3,661.75 mi (5,893.01 km) |
| Potomac to Keynsham | 3,571.19 mi (5,747.28 km) |
