| London Colney to Port Chester (New York) | 3,423.02 mi (5,508.81 km) |
| London Colney to Port Hueneme (California) | 5,449.12 mi (8,769.51 km) |
| London Colney to Port Huron (Michigan) | 3,684.73 mi (5,930.01 km) |
| London Colney to Port Lavaca (Texas) | 4,945.25 mi (7,958.61 km) |
| London Colney to Port Neches (Texas) | 4,768.45 mi (7,674.07 km) |
| London Colney to Port Orange (Florida) | 4,284.85 mi (6,895.80 km) |
| London Colney to Port Orchard (Washington) | 4,781.56 mi (7,695.18 km) |
| London Colney to Port Royal (South Carolina) | 4,111.79 mi (6,617.28 km) |
| London Colney to Port Salerno (Florida) | 4,348.60 mi (6,998.40 km) |
| London Colney to Port St. John (Florida) | 4,307.95 mi (6,932.98 km) |
| London Colney to Port St. Lucie (Florida) | 4,350.26 mi (7,001.06 km) |
| London Colney to Port Washington (New York) | 3,431.08 mi (5,521.79 km) |
| London Colney to Port Washington (Wisconsin) | 3,873.89 mi (6,234.43 km) |
| London Colney to Port Wentworth (Georgia) | 4,140.14 mi (6,662.92 km) |
| London Colney to Portage (Indiana) | 3,930.51 mi (6,325.55 km) |
