| Douai to Cologno al Serio | 450.43 mi (724.90 km) |
| Douai to Cologno Monzese | 440.41 mi (708.78 km) |
| Douai to Colorno | 506.20 mi (814.65 km) |
| Douai to Comacchio | 577.05 mi (928.68 km) |
| Douai to Comiso | 1,088.72 mi (1,752.12 km) |
| Douai to Como | 419.42 mi (675.00 km) |
| Douai to Concordia Sagittaria | 551.28 mi (887.20 km) |
| Douai to Concorezzo | 438.85 mi (706.27 km) |
| Douai to Conegliano | 525.40 mi (845.55 km) |
| Douai to Conselice | 574.54 mi (924.64 km) |
| Douai to Conselve | 540.02 mi (869.08 km) |
| Douai to Conversano | 936.00 mi (1,506.35 km) |
| Douai to Copertino | 1,004.63 mi (1,616.80 km) |
| Douai to Copparo | 555.19 mi (893.50 km) |
| Douai to Corato | 901.96 mi (1,451.56 km) |
