| Illkirch-Graffenstaden to Castle Rock (Colorado) | 5,099.61 mi (8,207.03 km) |
| Illkirch-Graffenstaden to Castro Valley (California) | 5,729.94 mi (9,221.45 km) |
| Illkirch-Graffenstaden to Catalina Foothills (Arizona) | 5,692.42 mi (9,161.07 km) |
| Illkirch-Graffenstaden to Cataño (Puerto Rico) | 4,539.15 mi (7,305.05 km) |
| Illkirch-Graffenstaden to Cathedral City (California) | 5,789.35 mi (9,317.05 km) |
| Illkirch-Graffenstaden to Catonsville (Maryland) | 4,036.32 mi (6,495.83 km) |
| Illkirch-Graffenstaden to Cave Spring (Virginia) | 4,262.54 mi (6,859.89 km) |
| Illkirch-Graffenstaden to Cayce (South Carolina) | 4,457.54 mi (7,173.71 km) |
| Illkirch-Graffenstaden to Cayey (Puerto Rico) | 4,555.98 mi (7,332.15 km) |
| Illkirch-Graffenstaden to Cedar City (Utah) | 5,463.37 mi (8,792.45 km) |
| Illkirch-Graffenstaden to Cedar Falls (Iowa) | 4,501.63 mi (7,244.68 km) |
| Illkirch-Graffenstaden to Cedar Hill (Texas) | 5,168.59 mi (8,318.04 km) |
| Illkirch-Graffenstaden to Cedar Lake (Indiana) | 4,368.21 mi (7,029.95 km) |
| Illkirch-Graffenstaden to Cedar Mill (Oregon) | 5,285.90 mi (8,506.84 km) |
| Illkirch-Graffenstaden to Cedar Park (Texas) | 5,309.55 mi (8,544.89 km) |
