| Diamond Bar to Chivasso | 5,997.60 mi (9,652.20 km) |
| Diamond Bar to Ciampino | 6,329.18 mi (10,185.82 km) |
| Diamond Bar to Cicciano | 6,436.62 mi (10,358.75 km) |
| Diamond Bar to Cingoli | 6,264.69 mi (10,082.04 km) |
| Diamond Bar to Cinisello Balsamo | 6,022.29 mi (9,691.94 km) |
| Diamond Bar to Cinisi | 6,540.83 mi (10,526.44 km) |
| Diamond Bar to Cirie | 5,985.91 mi (9,633.39 km) |
| Diamond Bar to Ciro Marina | 6,607.18 mi (10,633.23 km) |
| Diamond Bar to Cislago | 6,009.10 mi (9,670.71 km) |
| Diamond Bar to Cisterna di Latina | 6,347.82 mi (10,215.83 km) |
| Diamond Bar to Cisternino | 6,540.42 mi (10,525.80 km) |
| Diamond Bar to Citta di Castello | 6,228.88 mi (10,024.41 km) |
| Diamond Bar to Citta Sant'Angelo | 6,336.89 mi (10,198.24 km) |
| Diamond Bar to Cittadella | 6,097.81 mi (9,813.48 km) |
| Diamond Bar to Cittanova | 6,630.34 mi (10,670.50 km) |
