| Clemson to Popovo | 5,439.46 mi (8,753.97 km) |
| Clemson to Provadia | 5,494.15 mi (8,841.99 km) |
| Clemson to Radnevo | 5,471.64 mi (8,805.75 km) |
| Clemson to Radomir | 5,339.28 mi (8,592.75 km) |
| Clemson to Rakitovo | 5,409.17 mi (8,705.22 km) |
| Clemson to Rakovski | 5,432.77 mi (8,743.19 km) |
| Clemson to Razgrad | 5,442.98 mi (8,759.64 km) |
| Clemson to Razlog | 5,387.74 mi (8,670.74 km) |
| Clemson to Ruse | 5,408.48 mi (8,704.11 km) |
| Clemson to Samokov | 5,372.91 mi (8,646.86 km) |
| Clemson to Sandanski | 5,392.92 mi (8,679.07 km) |
| Clemson to Sevlievo | 5,408.13 mi (8,703.54 km) |
| Clemson to Shumen | 5,470.09 mi (8,803.27 km) |
| Clemson to Silistra | 5,447.47 mi (8,766.86 km) |
| Clemson to Sliven | 5,471.60 mi (8,805.69 km) |
