| Rio Maior to Cividale del Friuli | 1,222.64 mi (1,967.65 km) |
| Rio Maior to Civita Castellana | 1,131.57 mi (1,821.08 km) |
| Rio Maior to Civitanova Marche | 1,203.73 mi (1,937.21 km) |
| Rio Maior to Civitavecchia | 1,099.64 mi (1,769.71 km) |
| Rio Maior to Civitella in Val di Chiana | 1,104.01 mi (1,776.73 km) |
| Rio Maior to Clusone | 1,058.08 mi (1,702.81 km) |
| Rio Maior to Coccaglio | 1,052.54 mi (1,693.90 km) |
| Rio Maior to Codigoro | 1,140.42 mi (1,835.33 km) |
| Rio Maior to Codogno | 1,031.74 mi (1,660.42 km) |
| Rio Maior to Codroipo | 1,199.17 mi (1,929.88 km) |
| Rio Maior to Cogoleto | 967.30 mi (1,556.71 km) |
| Rio Maior to Colle di Val d'Elsa | 1,074.85 mi (1,729.80 km) |
| Rio Maior to Colle Salvetti | 1,044.84 mi (1,681.50 km) |
| Rio Maior to Collecchio | 1,048.39 mi (1,687.22 km) |
| Rio Maior to Colleferro | 1,161.29 mi (1,868.91 km) |
