| Diamond Bar to Celano | 6,344.61 mi (10,210.67 km) |
| Diamond Bar to Cento | 6,130.80 mi (9,866.56 km) |
| Diamond Bar to Cepagatti | 6,345.57 mi (10,212.21 km) |
| Diamond Bar to Ceprano | 6,372.30 mi (10,255.23 km) |
| Diamond Bar to Cercola | 6,436.19 mi (10,358.05 km) |
| Diamond Bar to Cerea | 6,104.03 mi (9,823.48 km) |
| Diamond Bar to Cerese | 6,097.23 mi (9,812.54 km) |
| Diamond Bar to Cerignola | 6,463.34 mi (10,401.74 km) |
| Diamond Bar to Cermenate | 6,010.26 mi (9,672.58 km) |
| Diamond Bar to Cernusco sul Naviglio | 6,027.75 mi (9,700.73 km) |
| Diamond Bar to Cerreto Guidi | 6,169.04 mi (9,928.11 km) |
| Diamond Bar to Cerro Maggiore | 6,011.14 mi (9,674.00 km) |
| Diamond Bar to Certaldo | 6,185.68 mi (9,954.89 km) |
| Diamond Bar to Cerveteri | 6,302.19 mi (10,142.40 km) |
| Diamond Bar to Cervia | 6,189.79 mi (9,961.50 km) |
