| Civitavecchia to Smolyan | 664.34 mi (1,069.15 km) |
| Civitavecchia to Sofia | 589.29 mi (948.36 km) |
| Civitavecchia to Sopot | 661.45 mi (1,064.49 km) |
| Civitavecchia to Sozopol | 812.19 mi (1,307.09 km) |
| Civitavecchia to Sredets | 787.04 mi (1,266.62 km) |
| Civitavecchia to Stamboliyski | 652.01 mi (1,049.30 km) |
| Civitavecchia to Stara Zagora | 707.75 mi (1,139.01 km) |
| Civitavecchia to Svilengrad | 739.64 mi (1,190.34 km) |
| Civitavecchia to Svishtov | 693.43 mi (1,115.97 km) |
| Civitavecchia to Targovishte | 754.16 mi (1,213.70 km) |
| Civitavecchia to Teteven | 636.89 mi (1,024.98 km) |
| Civitavecchia to Troyan | 659.64 mi (1,061.60 km) |
| Civitavecchia to Tryavna | 699.31 mi (1,125.43 km) |
| Civitavecchia to Tutrakan | 758.75 mi (1,221.09 km) |
| Civitavecchia to Varna | 821.26 mi (1,321.69 km) |
