| Markham to Portage (Michigan) | 115.67 mi (186.15 km) |
| Markham to Portage (Wisconsin) | 162.14 mi (260.94 km) |
| Markham to Portales (New Mexico) | 994.15 mi (1,599.92 km) |
| Markham to Porterville (California) | 1,719.70 mi (2,767.60 km) |
| Markham to Portland (Maine) | 895.20 mi (1,440.69 km) |
| Markham to Portland (Oregon) | 1,756.91 mi (2,827.48 km) |
| Markham to Portland (Tennessee) | 351.61 mi (565.86 km) |
| Markham to Portland (Texas) | 1,091.97 mi (1,757.36 km) |
| Markham to Portsmouth (New Hampshire) | 868.01 mi (1,396.92 km) |
| Markham to Portsmouth (Ohio) | 318.42 mi (512.44 km) |
| Markham to Portsmouth (Virginia) | 689.15 mi (1,109.09 km) |
| Markham to Post Falls (Idaho) | 1,488.25 mi (2,395.11 km) |
| Markham to Potomac (Maryland) | 580.73 mi (934.60 km) |
| Markham to Potomac Park (California) | 1,735.18 mi (2,792.51 km) |
| Markham to Pottstown (Pennsylvania) | 635.18 mi (1,022.22 km) |
