| Duffel to Portage (Michigan) | 4,044.78 mi (6,509.44 km) |
| Duffel to Portage (Wisconsin) | 4,124.64 mi (6,637.96 km) |
| Duffel to Portales (New Mexico) | 5,104.36 mi (8,214.67 km) |
| Duffel to Porterville (California) | 5,511.57 mi (8,870.02 km) |
| Duffel to Portland (Maine) | 3,382.63 mi (5,443.82 km) |
| Duffel to Portland (Oregon) | 5,054.85 mi (8,135.00 km) |
| Duffel to Portland (Tennessee) | 4,349.44 mi (6,999.74 km) |
| Duffel to Portland (Texas) | 5,217.38 mi (8,396.56 km) |
| Duffel to Portsmouth (New Hampshire) | 3,428.83 mi (5,518.17 km) |
| Duffel to Portsmouth (Ohio) | 4,105.01 mi (6,606.37 km) |
| Duffel to Portsmouth (Virginia) | 3,929.87 mi (6,324.52 km) |
| Duffel to Post Falls (Idaho) | 4,780.19 mi (7,692.98 km) |
| Duffel to Potomac (Maryland) | 3,864.15 mi (6,218.75 km) |
| Duffel to Potomac Park (California) | 5,550.53 mi (8,932.71 km) |
| Duffel to Pottstown (Pennsylvania) | 3,745.89 mi (6,028.42 km) |
