| Simi Valley to Cividale del Friuli | 6,135.64 mi (9,874.37 km) |
| Simi Valley to Civita Castellana | 6,311.11 mi (10,156.75 km) |
| Simi Valley to Civitanova Marche | 6,297.80 mi (10,135.33 km) |
| Simi Valley to Civitavecchia | 6,302.16 mi (10,142.35 km) |
| Simi Valley to Civitella in Val di Chiana | 6,228.74 mi (10,024.18 km) |
| Simi Valley to Clusone | 6,042.06 mi (9,723.76 km) |
| Simi Valley to Coccaglio | 6,059.83 mi (9,752.36 km) |
| Simi Valley to Codigoro | 6,164.91 mi (9,921.47 km) |
| Simi Valley to Codogno | 6,072.52 mi (9,772.77 km) |
| Simi Valley to Codroipo | 6,129.75 mi (9,864.87 km) |
| Simi Valley to Cogoleto | 6,078.99 mi (9,783.19 km) |
| Simi Valley to Colle di Val d'Elsa | 6,211.14 mi (9,995.86 km) |
| Simi Valley to Colle Salvetti | 6,179.73 mi (9,945.32 km) |
| Simi Valley to Collecchio | 6,110.30 mi (9,833.58 km) |
| Simi Valley to Colleferro | 6,360.93 mi (10,236.92 km) |
