| Greenock to Port Chester (New York) | 3,172.41 mi (5,105.51 km) |
| Greenock to Port Hueneme (California) | 5,121.38 mi (8,242.06 km) |
| Greenock to Port Huron (Michigan) | 3,405.12 mi (5,480.02 km) |
| Greenock to Port Lavaca (Texas) | 4,671.56 mi (7,518.14 km) |
| Greenock to Port Neches (Texas) | 4,498.51 mi (7,239.65 km) |
| Greenock to Port Orange (Florida) | 4,056.58 mi (6,528.43 km) |
| Greenock to Port Orchard (Washington) | 4,440.75 mi (7,146.70 km) |
| Greenock to Port Royal (South Carolina) | 3,873.29 mi (6,233.46 km) |
| Greenock to Port Salerno (Florida) | 4,129.95 mi (6,646.51 km) |
| Greenock to Port St. John (Florida) | 4,082.54 mi (6,570.21 km) |
| Greenock to Port St. Lucie (Florida) | 4,130.44 mi (6,647.29 km) |
| Greenock to Port Washington (New York) | 3,181.20 mi (5,119.65 km) |
| Greenock to Port Washington (Wisconsin) | 3,581.76 mi (5,764.29 km) |
| Greenock to Port Wentworth (Georgia) | 3,900.64 mi (6,277.48 km) |
| Greenock to Portage (Indiana) | 3,645.03 mi (5,866.11 km) |
