| Formia to Sangeorz-Bai | 689.48 mi (1,109.62 km) |
| Formia to Sannicolau Mare | 481.43 mi (774.78 km) |
| Formia to Santana | 526.66 mi (847.57 km) |
| Formia to Satu Mare | 640.85 mi (1,031.34 km) |
| Formia to Scobinti | 780.59 mi (1,256.23 km) |
| Formia to Scornicesti | 597.83 mi (962.11 km) |
| Formia to Sebes | 593.51 mi (955.16 km) |
| Formia to Seini | 652.91 mi (1,050.76 km) |
| Formia to Sfantu-Gheorghe | 686.11 mi (1,104.19 km) |
| Formia to Sibiu | 612.70 mi (986.05 km) |
| Formia to Sighetu Marmatiei | 682.63 mi (1,098.59 km) |
| Formia to Sighisoara | 653.39 mi (1,051.53 km) |
| Formia to Simeria | 566.40 mi (911.54 km) |
| Formia to Sinaia | 662.18 mi (1,065.67 km) |
| Formia to Slatina | 586.08 mi (943.21 km) |
