| Boppard to Portage (Michigan) | 4,191.12 mi (6,744.96 km) |
| Boppard to Portage (Wisconsin) | 4,269.70 mi (6,871.41 km) |
| Boppard to Portales (New Mexico) | 5,248.49 mi (8,446.63 km) |
| Boppard to Porterville (California) | 5,646.33 mi (9,086.88 km) |
| Boppard to Portland (Maine) | 3,530.01 mi (5,681.00 km) |
| Boppard to Portland (Oregon) | 5,180.74 mi (8,337.60 km) |
| Boppard to Portland (Tennessee) | 4,496.64 mi (7,236.65 km) |
| Boppard to Portland (Texas) | 5,364.43 mi (8,633.22 km) |
| Boppard to Portsmouth (New Hampshire) | 3,576.19 mi (5,755.33 km) |
| Boppard to Portsmouth (Ohio) | 4,252.27 mi (6,843.37 km) |
| Boppard to Portsmouth (Virginia) | 4,077.00 mi (6,561.29 km) |
| Boppard to Post Falls (Idaho) | 4,908.97 mi (7,900.23 km) |
| Boppard to Potomac (Maryland) | 4,011.51 mi (6,455.91 km) |
| Boppard to Potomac Park (California) | 5,685.72 mi (9,150.28 km) |
| Boppard to Pottstown (Pennsylvania) | 3,893.25 mi (6,265.59 km) |
