| Sparks to Popovo | 6,325.65 mi (10,180.15 km) |
| Sparks to Provadia | 6,361.74 mi (10,238.23 km) |
| Sparks to Radnevo | 6,384.44 mi (10,274.76 km) |
| Sparks to Radomir | 6,300.32 mi (10,139.39 km) |
| Sparks to Rakitovo | 6,361.80 mi (10,238.33 km) |
| Sparks to Rakovski | 6,363.36 mi (10,240.84 km) |
| Sparks to Razgrad | 6,320.33 mi (10,171.59 km) |
| Sparks to Razlog | 6,353.40 mi (10,224.81 km) |
| Sparks to Ruse | 6,290.13 mi (10,122.99 km) |
| Sparks to Samokov | 6,327.69 mi (10,183.43 km) |
| Sparks to Sandanski | 6,368.30 mi (10,248.78 km) |
| Sparks to Sevlievo | 6,321.09 mi (10,172.81 km) |
| Sparks to Shumen | 6,344.87 mi (10,211.09 km) |
| Sparks to Silistra | 6,299.54 mi (10,138.13 km) |
| Sparks to Sliven | 6,369.39 mi (10,250.54 km) |
