| Thornton to Portage (Michigan) | 3,721.67 mi (5,989.44 km) |
| Thornton to Portage (Wisconsin) | 3,799.45 mi (6,114.63 km) |
| Thornton to Portales (New Mexico) | 4,778.56 mi (7,690.35 km) |
| Thornton to Porterville (California) | 5,190.14 mi (8,352.72 km) |
| Thornton to Portland (Maine) | 3,068.45 mi (4,938.20 km) |
| Thornton to Portland (Oregon) | 4,743.61 mi (7,634.10 km) |
| Thornton to Portland (Tennessee) | 4,030.29 mi (6,486.13 km) |
| Thornton to Portland (Texas) | 4,896.94 mi (7,880.86 km) |
| Thornton to Portsmouth (New Hampshire) | 3,115.20 mi (5,013.44 km) |
| Thornton to Portsmouth (Ohio) | 3,786.51 mi (6,093.80 km) |
| Thornton to Portsmouth (Virginia) | 3,620.42 mi (5,826.50 km) |
| Thornton to Post Falls (Idaho) | 4,465.48 mi (7,186.49 km) |
| Thornton to Potomac (Maryland) | 3,550.48 mi (5,713.94 km) |
| Thornton to Potomac Park (California) | 5,228.69 mi (8,414.76 km) |
| Thornton to Pottstown (Pennsylvania) | 3,431.96 mi (5,523.20 km) |
