| Canals to Portage (Michigan) | 4,270.10 mi (6,872.06 km) |
| Canals to Portage (Wisconsin) | 4,396.13 mi (7,074.88 km) |
| Canals to Portales (New Mexico) | 5,376.78 mi (8,653.08 km) |
| Canals to Porterville (California) | 5,938.13 mi (9,556.49 km) |
| Canals to Portland (Maine) | 3,522.98 mi (5,669.69 km) |
| Canals to Portland (Oregon) | 5,583.75 mi (8,986.18 km) |
| Canals to Portland (Tennessee) | 4,506.65 mi (7,252.76 km) |
| Canals to Portland (Texas) | 5,366.71 mi (8,636.88 km) |
| Canals to Portsmouth (New Hampshire) | 3,562.04 mi (5,732.56 km) |
| Canals to Portsmouth (Ohio) | 4,262.41 mi (6,859.69 km) |
| Canals to Portsmouth (Virginia) | 4,006.84 mi (6,448.39 km) |
| Canals to Post Falls (Idaho) | 5,287.36 mi (8,509.18 km) |
| Canals to Potomac (Maryland) | 3,980.13 mi (6,405.40 km) |
| Canals to Potomac Park (California) | 5,970.73 mi (9,608.97 km) |
| Canals to Pottstown (Pennsylvania) | 3,868.77 mi (6,226.18 km) |
