| Riihimaki to Karlovo | 1,249.88 mi (2,011.48 km) |
| Riihimaki to Karnobat | 1,254.01 mi (2,018.14 km) |
| Riihimaki to Kavarna | 1,204.43 mi (1,938.35 km) |
| Riihimaki to Kazanlak | 1,252.02 mi (2,014.92 km) |
| Riihimaki to Knezha | 1,191.04 mi (1,916.80 km) |
| Riihimaki to Kostinbrod | 1,239.60 mi (1,994.95 km) |
| Riihimaki to Kozloduy | 1,171.91 mi (1,886.01 km) |
| Riihimaki to Kyustendil | 1,277.76 mi (2,056.35 km) |
| Riihimaki to Levski | 1,200.01 mi (1,931.23 km) |
| Riihimaki to Lom | 1,169.92 mi (1,882.80 km) |
| Riihimaki to Lovech | 1,215.95 mi (1,956.88 km) |
| Riihimaki to Lukovit | 1,211.69 mi (1,950.03 km) |
| Riihimaki to Lyaskovets | 1,218.98 mi (1,961.77 km) |
| Riihimaki to Mezdra | 1,215.70 mi (1,956.48 km) |
| Riihimaki to Momchilgrad | 1,326.87 mi (2,135.40 km) |
