| Royston to Portage (Michigan) | 3,842.14 mi (6,183.33 km) |
| Royston to Portage (Wisconsin) | 3,924.42 mi (6,315.74 km) |
| Royston to Portales (New Mexico) | 4,905.63 mi (7,894.86 km) |
| Royston to Porterville (California) | 5,327.84 mi (8,574.32 km) |
| Royston to Portland (Maine) | 3,177.27 mi (5,113.33 km) |
| Royston to Portland (Oregon) | 4,885.02 mi (7,861.68 km) |
| Royston to Portland (Tennessee) | 4,144.87 mi (6,670.52 km) |
| Royston to Portland (Texas) | 5,013.18 mi (8,067.94 km) |
| Royston to Portsmouth (New Hampshire) | 3,223.43 mi (5,187.61 km) |
| Royston to Portsmouth (Ohio) | 3,900.29 mi (6,276.90 km) |
| Royston to Portsmouth (Virginia) | 3,724.43 mi (5,993.89 km) |
| Royston to Post Falls (Idaho) | 4,606.13 mi (7,412.86 km) |
| Royston to Potomac (Maryland) | 3,658.75 mi (5,888.18 km) |
| Royston to Potomac Park (California) | 5,366.10 mi (8,635.90 km) |
| Royston to Pottstown (Pennsylvania) | 3,540.50 mi (5,697.88 km) |
