| Gronau to Portage (Michigan) | 4,099.70 mi (6,597.83 km) |
| Gronau to Portage (Wisconsin) | 4,172.26 mi (6,714.60 km) |
| Gronau to Portales (New Mexico) | 5,147.44 mi (8,284.00 km) |
| Gronau to Porterville (California) | 5,527.76 mi (8,896.07 km) |
| Gronau to Portland (Maine) | 3,453.07 mi (5,557.18 km) |
| Gronau to Portland (Oregon) | 5,053.92 mi (8,133.50 km) |
| Gronau to Portland (Tennessee) | 4,412.56 mi (7,101.33 km) |
| Gronau to Portland (Texas) | 5,277.96 mi (8,494.05 km) |
| Gronau to Portsmouth (New Hampshire) | 3,499.94 mi (5,632.60 km) |
| Gronau to Portsmouth (Ohio) | 4,169.25 mi (6,709.77 km) |
| Gronau to Portsmouth (Virginia) | 4,005.57 mi (6,446.35 km) |
| Gronau to Post Falls (Idaho) | 4,784.53 mi (7,699.96 km) |
| Gronau to Potomac (Maryland) | 3,935.15 mi (6,333.01 km) |
| Gronau to Potomac Park (California) | 5,567.67 mi (8,960.30 km) |
| Gronau to Pottstown (Pennsylvania) | 3,816.59 mi (6,142.20 km) |
