| Kingsport to Popovo | 5,338.60 mi (8,591.65 km) |
| Kingsport to Provadia | 5,392.72 mi (8,678.74 km) |
| Kingsport to Radnevo | 5,372.15 mi (8,645.63 km) |
| Kingsport to Radomir | 5,241.44 mi (8,435.28 km) |
| Kingsport to Rakitovo | 5,311.26 mi (8,547.64 km) |
| Kingsport to Rakovski | 5,333.92 mi (8,584.11 km) |
| Kingsport to Razgrad | 5,341.75 mi (8,596.71 km) |
| Kingsport to Razlog | 5,290.35 mi (8,514.00 km) |
| Kingsport to Ruse | 5,307.28 mi (8,541.24 km) |
| Kingsport to Samokov | 5,274.92 mi (8,489.16 km) |
| Kingsport to Sandanski | 5,296.03 mi (8,523.13 km) |
| Kingsport to Sevlievo | 5,308.34 mi (8,542.95 km) |
| Kingsport to Shumen | 5,368.87 mi (8,640.36 km) |
| Kingsport to Silistra | 5,345.14 mi (8,602.17 km) |
| Kingsport to Sliven | 5,371.42 mi (8,644.46 km) |
