| Clearlake to Popovo | 6,425.88 mi (10,341.45 km) |
| Clearlake to Provadia | 6,460.35 mi (10,396.92 km) |
| Clearlake to Radnevo | 6,486.08 mi (10,438.33 km) |
| Clearlake to Radomir | 6,406.02 mi (10,309.49 km) |
| Clearlake to Rakitovo | 6,466.44 mi (10,406.72 km) |
| Clearlake to Rakovski | 6,466.43 mi (10,406.71 km) |
| Clearlake to Razgrad | 6,419.98 mi (10,331.95 km) |
| Clearlake to Razlog | 6,459.01 mi (10,394.77 km) |
| Clearlake to Ruse | 6,390.33 mi (10,284.24 km) |
| Clearlake to Samokov | 6,432.73 mi (10,352.48 km) |
| Clearlake to Sandanski | 6,474.47 mi (10,419.65 km) |
| Clearlake to Sevlievo | 6,423.25 mi (10,337.22 km) |
| Clearlake to Shumen | 6,444.13 mi (10,370.83 km) |
| Clearlake to Silistra | 6,397.55 mi (10,295.87 km) |
| Clearlake to Sliven | 6,470.09 mi (10,412.60 km) |
