| Spencer to Popovo | 5,449.01 mi (8,769.34 km) |
| Spencer to Provadia | 5,495.99 mi (8,844.95 km) |
| Spencer to Radnevo | 5,495.40 mi (8,843.99 km) |
| Spencer to Radomir | 5,383.81 mi (8,664.40 km) |
| Spencer to Rakitovo | 5,451.31 mi (8,773.04 km) |
| Spencer to Rakovski | 5,464.40 mi (8,794.11 km) |
| Spencer to Razgrad | 5,448.23 mi (8,768.08 km) |
| Spencer to Razlog | 5,435.92 mi (8,748.27 km) |
| Spencer to Ruse | 5,414.90 mi (8,714.44 km) |
| Spencer to Samokov | 5,415.15 mi (8,714.85 km) |
| Spencer to Sandanski | 5,446.19 mi (8,764.80 km) |
| Spencer to Sevlievo | 5,430.21 mi (8,739.08 km) |
| Spencer to Shumen | 5,474.83 mi (8,810.88 km) |
| Spencer to Silistra | 5,440.29 mi (8,755.31 km) |
| Spencer to Sliven | 5,487.84 mi (8,831.83 km) |
