| Markham to Port Chester (New York) | 728.19 mi (1,171.91 km) |
| Markham to Port Hueneme (California) | 1,782.52 mi (2,868.68 km) |
| Markham to Port Huron (Michigan) | 284.83 mi (458.39 km) |
| Markham to Port Lavaca (Texas) | 1,028.03 mi (1,654.45 km) |
| Markham to Port Neches (Texas) | 875.66 mi (1,409.24 km) |
| Markham to Port Orange (Florida) | 940.74 mi (1,513.98 km) |
| Markham to Port Orchard (Washington) | 1,753.59 mi (2,822.12 km) |
| Markham to Port Royal (South Carolina) | 745.50 mi (1,199.77 km) |
| Markham to Port Salerno (Florida) | 1,085.31 mi (1,746.64 km) |
| Markham to Port St. John (Florida) | 985.94 mi (1,586.71 km) |
| Markham to Port St. Lucie (Florida) | 1,072.32 mi (1,725.73 km) |
| Markham to Port Washington (New York) | 729.54 mi (1,174.08 km) |
| Markham to Port Washington (Wisconsin) | 123.70 mi (199.08 km) |
| Markham to Port Wentworth (Georgia) | 741.67 mi (1,193.61 km) |
| Markham to Portage (Indiana) | 26.41 mi (42.50 km) |
