| Wilmette to Cocentaina | 4,384.76 mi (7,056.59 km) |
| Wilmette to Coin | 4,268.14 mi (6,868.91 km) |
| Wilmette to Colindres | 4,080.54 mi (6,567.00 km) |
| Wilmette to Collado-Villalba | 4,154.66 mi (6,686.28 km) |
| Wilmette to Colmenar Viejo | 4,164.54 mi (6,702.18 km) |
| Wilmette to Colmenarejo | 4,156.91 mi (6,689.90 km) |
| Wilmette to Conil de la Frontera | 4,221.20 mi (6,793.36 km) |
| Wilmette to Consuegra | 4,215.64 mi (6,784.42 km) |
| Wilmette to Corbera de Llobregat | 4,385.56 mi (7,057.87 km) |
| Wilmette to Cordoba | 4,220.97 mi (6,792.99 km) |
| Wilmette to Coria del Rio | 4,184.75 mi (6,734.71 km) |
| Wilmette to Crevillente | 4,387.47 mi (7,060.95 km) |
| Wilmette to Cuarte de Huerva | 4,256.03 mi (6,849.41 km) |
| Wilmette to Cubellas | 4,382.44 mi (7,052.85 km) |
| Wilmette to Cuellar | 4,113.41 mi (6,619.90 km) |
