| Riihimaki to Smolyan | 1,323.14 mi (2,129.39 km) |
| Riihimaki to Sofia | 1,247.42 mi (2,007.53 km) |
| Riihimaki to Sopot | 1,249.44 mi (2,010.77 km) |
| Riihimaki to Sozopol | 1,271.50 mi (2,046.28 km) |
| Riihimaki to Sredets | 1,274.25 mi (2,050.70 km) |
| Riihimaki to Stamboliyski | 1,285.17 mi (2,068.29 km) |
| Riihimaki to Stara Zagora | 1,264.95 mi (2,035.74 km) |
| Riihimaki to Svilengrad | 1,311.85 mi (2,111.22 km) |
| Riihimaki to Svishtov | 1,182.89 mi (1,903.68 km) |
| Riihimaki to Targovishte | 1,210.33 mi (1,947.85 km) |
| Riihimaki to Teteven | 1,231.18 mi (1,981.40 km) |
| Riihimaki to Troyan | 1,233.32 mi (1,984.83 km) |
| Riihimaki to Tryavna | 1,234.83 mi (1,987.26 km) |
| Riihimaki to Tutrakan | 1,155.23 mi (1,859.16 km) |
| Riihimaki to Varna | 1,217.34 mi (1,959.12 km) |
