| Riihimaki to Popovo | 1,202.61 mi (1,935.42 km) |
| Riihimaki to Provadia | 1,217.64 mi (1,959.61 km) |
| Riihimaki to Radnevo | 1,274.56 mi (2,051.20 km) |
| Riihimaki to Radomir | 1,258.64 mi (2,025.58 km) |
| Riihimaki to Rakitovo | 1,295.82 mi (2,085.42 km) |
| Riihimaki to Rakovski | 1,274.45 mi (2,051.02 km) |
| Riihimaki to Razgrad | 1,190.62 mi (1,916.11 km) |
| Riihimaki to Razlog | 1,303.56 mi (2,097.87 km) |
| Riihimaki to Ruse | 1,169.41 mi (1,881.99 km) |
| Riihimaki to Samokov | 1,272.07 mi (2,047.19 km) |
| Riihimaki to Sandanski | 1,325.67 mi (2,133.45 km) |
| Riihimaki to Sevlievo | 1,223.57 mi (1,969.14 km) |
| Riihimaki to Shumen | 1,209.03 mi (1,945.75 km) |
| Riihimaki to Silistra | 1,152.65 mi (1,855.02 km) |
| Riihimaki to Sliven | 1,248.85 mi (2,009.83 km) |
