| Shannon to Portage (Michigan) | 3,481.88 mi (5,603.54 km) |
| Shannon to Portage (Wisconsin) | 3,571.55 mi (5,747.85 km) |
| Shannon to Portales (New Mexico) | 4,555.97 mi (7,332.12 km) |
| Shannon to Porterville (California) | 5,014.02 mi (8,069.28 km) |
| Shannon to Portland (Maine) | 2,805.84 mi (4,515.56 km) |
| Shannon to Portland (Oregon) | 4,603.43 mi (7,408.51 km) |
| Shannon to Portland (Tennessee) | 3,777.42 mi (6,079.17 km) |
| Shannon to Portland (Texas) | 4,646.92 mi (7,478.49 km) |
| Shannon to Portsmouth (New Hampshire) | 2,851.60 mi (4,589.21 km) |
| Shannon to Portsmouth (Ohio) | 3,532.24 mi (5,684.59 km) |
| Shannon to Portsmouth (Virginia) | 3,350.35 mi (5,391.87 km) |
| Shannon to Post Falls (Idaho) | 4,316.08 mi (6,946.06 km) |
| Shannon to Potomac (Maryland) | 3,286.74 mi (5,289.49 km) |
| Shannon to Potomac Park (California) | 5,050.62 mi (8,128.18 km) |
| Shannon to Pottstown (Pennsylvania) | 3,168.71 mi (5,099.54 km) |
