| Sumner to Popovo | 5,890.01 mi (9,479.05 km) |
| Sumner to Provadia | 5,921.94 mi (9,530.44 km) |
| Sumner to Radnevo | 5,952.32 mi (9,579.33 km) |
| Sumner to Radomir | 5,879.36 mi (9,461.92 km) |
| Sumner to Rakitovo | 5,937.74 mi (9,555.88 km) |
| Sumner to Rakovski | 5,935.06 mi (9,551.55 km) |
| Sumner to Razgrad | 5,883.22 mi (9,468.12 km) |
| Sumner to Razlog | 5,932.07 mi (9,546.74 km) |
| Sumner to Ruse | 5,854.48 mi (9,421.88 km) |
| Sumner to Samokov | 5,904.85 mi (9,502.94 km) |
| Sumner to Sandanski | 5,948.51 mi (9,573.21 km) |
| Sumner to Sevlievo | 5,890.47 mi (9,479.80 km) |
| Sumner to Shumen | 5,906.74 mi (9,505.97 km) |
| Sumner to Silistra | 5,858.40 mi (9,428.18 km) |
| Sumner to Sliven | 5,934.86 mi (9,551.23 km) |
