| Charleston to Popovo | 5,415.18 mi (8,714.88 km) |
| Charleston to Provadia | 5,471.28 mi (8,805.18 km) |
| Charleston to Radnevo | 5,443.76 mi (8,760.89 km) |
| Charleston to Radomir | 5,307.50 mi (8,541.59 km) |
| Charleston to Rakitovo | 5,377.42 mi (8,654.12 km) |
| Charleston to Rakovski | 5,403.32 mi (8,695.80 km) |
| Charleston to Razgrad | 5,419.69 mi (8,722.15 km) |
| Charleston to Razlog | 5,354.73 mi (8,617.61 km) |
| Charleston to Ruse | 5,385.17 mi (8,666.60 km) |
| Charleston to Samokov | 5,341.40 mi (8,596.16 km) |
| Charleston to Sandanski | 5,358.67 mi (8,623.95 km) |
| Charleston to Sevlievo | 5,381.12 mi (8,660.07 km) |
| Charleston to Shumen | 5,446.72 mi (8,765.65 km) |
| Charleston to Silistra | 5,427.08 mi (8,734.04 km) |
| Charleston to Sliven | 5,445.49 mi (8,763.68 km) |
