| Clarkston to Popovo | 5,539.48 mi (8,914.94 km) |
| Clarkston to Provadia | 5,594.06 mi (9,002.76 km) |
| Clarkston to Radnevo | 5,571.93 mi (8,967.16 km) |
| Clarkston to Radomir | 5,439.85 mi (8,754.60 km) |
| Clarkston to Rakitovo | 5,509.73 mi (8,867.05 km) |
| Clarkston to Rakovski | 5,533.17 mi (8,904.78 km) |
| Clarkston to Razgrad | 5,542.93 mi (8,920.48 km) |
| Clarkston to Razlog | 5,488.38 mi (8,832.70 km) |
| Clarkston to Ruse | 5,508.43 mi (8,864.96 km) |
| Clarkston to Samokov | 5,473.45 mi (8,808.67 km) |
| Clarkston to Sandanski | 5,493.63 mi (8,841.14 km) |
| Clarkston to Sevlievo | 5,508.37 mi (8,864.86 km) |
| Clarkston to Shumen | 5,570.04 mi (8,964.11 km) |
| Clarkston to Silistra | 5,547.16 mi (8,927.30 km) |
| Clarkston to Sliven | 5,571.76 mi (8,966.89 km) |
