| Gretz-Armainvilliers to Cookeville (Tennessee) | 4,327.29 mi (6,964.11 km) |
| Gretz-Armainvilliers to Coolidge (Arizona) | 5,496.61 mi (8,845.94 km) |
| Gretz-Armainvilliers to Coon Rapids (Minnesota) | 4,217.27 mi (6,787.04 km) |
| Gretz-Armainvilliers to Cooper City (Florida) | 4,580.30 mi (7,371.29 km) |
| Gretz-Armainvilliers to Coos Bay (Oregon) | 5,307.52 mi (8,541.62 km) |
| Gretz-Armainvilliers to Copiague (New York) | 3,621.97 mi (5,829.00 km) |
| Gretz-Armainvilliers to Coppell (Texas) | 4,947.41 mi (7,962.09 km) |
| Gretz-Armainvilliers to Copperas Cove (Texas) | 5,077.62 mi (8,171.64 km) |
| Gretz-Armainvilliers to Coral Gables (Florida) | 4,596.22 mi (7,396.90 km) |
| Gretz-Armainvilliers to Coral Springs (Florida) | 4,568.29 mi (7,351.95 km) |
| Gretz-Armainvilliers to Coral Terrace (Florida) | 4,595.63 mi (7,395.96 km) |
| Gretz-Armainvilliers to Coralville (Iowa) | 4,313.26 mi (6,941.52 km) |
| Gretz-Armainvilliers to Coram (New York) | 3,597.07 mi (5,788.92 km) |
| Gretz-Armainvilliers to Corcoran (California) | 5,590.26 mi (8,996.65 km) |
| Gretz-Armainvilliers to Cordele (Georgia) | 4,450.00 mi (7,161.58 km) |
