| Diamond Bar to Casamassima | 6,512.43 mi (10,480.75 km) |
| Diamond Bar to Casandrino | 6,429.35 mi (10,347.04 km) |
| Diamond Bar to Casapulla | 6,423.16 mi (10,337.08 km) |
| Diamond Bar to Casarano | 6,603.15 mi (10,626.75 km) |
| Diamond Bar to Casatenovo | 6,017.65 mi (9,684.47 km) |
| Diamond Bar to Casciana Terme | 6,173.03 mi (9,934.54 km) |
| Diamond Bar to Cascina | 6,162.63 mi (9,917.80 km) |
| Diamond Bar to Caselle Torinese | 5,990.37 mi (9,640.56 km) |
| Diamond Bar to Caserta | 6,424.77 mi (10,339.66 km) |
| Diamond Bar to Casier | 6,113.70 mi (9,839.05 km) |
| Diamond Bar to Casorate Primo | 6,027.92 mi (9,700.99 km) |
| Diamond Bar to Casoria | 6,432.77 mi (10,352.55 km) |
| Diamond Bar to Cassano al Ionio | 6,558.53 mi (10,554.93 km) |
| Diamond Bar to Cassano d'Adda | 6,032.76 mi (9,708.78 km) |
| Diamond Bar to Cassano delle Murge | 6,511.52 mi (10,479.28 km) |
