| Greenock to Castle Rock (Colorado) | 4,371.36 mi (7,035.03 km) |
| Greenock to Castro Valley (California) | 4,997.12 mi (8,042.08 km) |
| Greenock to Catalina Foothills (Arizona) | 4,964.78 mi (7,990.03 km) |
| Greenock to Cataño (Puerto Rico) | 4,069.82 mi (6,549.74 km) |
| Greenock to Cathedral City (California) | 5,056.12 mi (8,137.05 km) |
| Greenock to Catonsville (Maryland) | 3,372.68 mi (5,427.80 km) |
| Greenock to Cave Spring (Virginia) | 3,597.16 mi (5,789.07 km) |
| Greenock to Cayce (South Carolina) | 3,803.63 mi (6,121.35 km) |
| Greenock to Cayey (Puerto Rico) | 4,088.79 mi (6,580.27 km) |
| Greenock to Cedar City (Utah) | 4,730.22 mi (7,612.55 km) |
| Greenock to Cedar Falls (Iowa) | 3,785.45 mi (6,092.09 km) |
| Greenock to Cedar Hill (Texas) | 4,467.07 mi (7,189.05 km) |
| Greenock to Cedar Lake (Indiana) | 3,665.08 mi (5,898.38 km) |
| Greenock to Cedar Mill (Oregon) | 4,559.11 mi (7,337.17 km) |
| Greenock to Cedar Park (Texas) | 4,611.11 mi (7,420.86 km) |
