| Birsfelden to Cernavoda | 1,002.27 mi (1,613.00 km) |
| Birsfelden to Chitila | 903.10 mi (1,453.40 km) |
| Birsfelden to Cisnadie | 792.81 mi (1,275.90 km) |
| Birsfelden to Cluj-Napoca | 750.44 mi (1,207.72 km) |
| Birsfelden to Codlea | 853.33 mi (1,373.31 km) |
| Birsfelden to Comanesti | 888.48 mi (1,429.86 km) |
| Birsfelden to Comarnic | 870.75 mi (1,401.33 km) |
| Birsfelden to Constanta | 1,034.22 mi (1,664.41 km) |
| Birsfelden to Corabia | 853.88 mi (1,374.19 km) |
| Birsfelden to Costesti | 848.32 mi (1,365.23 km) |
| Birsfelden to Covasna | 885.23 mi (1,424.63 km) |
| Birsfelden to Craiova | 807.50 mi (1,299.54 km) |
| Birsfelden to Cristuru Secuiesc | 824.52 mi (1,326.94 km) |
| Birsfelden to Cugir | 753.83 mi (1,213.17 km) |
| Birsfelden to Cumpana | 1,031.93 mi (1,660.73 km) |
