| Poplar Bluff to Popovo | 5,624.01 mi (9,050.97 km) |
| Poplar Bluff to Provadia | 5,675.46 mi (9,133.77 km) |
| Poplar Bluff to Radnevo | 5,663.00 mi (9,113.71 km) |
| Poplar Bluff to Radomir | 5,539.35 mi (8,914.72 km) |
| Poplar Bluff to Rakitovo | 5,608.59 mi (9,026.16 km) |
| Poplar Bluff to Rakovski | 5,627.51 mi (9,056.60 km) |
| Poplar Bluff to Razgrad | 5,625.55 mi (9,053.45 km) |
| Poplar Bluff to Razlog | 5,589.79 mi (8,995.91 km) |
| Poplar Bluff to Ruse | 5,591.37 mi (8,998.44 km) |
| Poplar Bluff to Samokov | 5,572.14 mi (8,967.50 km) |
| Poplar Bluff to Sandanski | 5,597.33 mi (9,008.03 km) |
| Poplar Bluff to Sevlievo | 5,598.30 mi (9,009.59 km) |
| Poplar Bluff to Shumen | 5,652.59 mi (9,096.97 km) |
| Poplar Bluff to Silistra | 5,624.25 mi (9,051.35 km) |
| Poplar Bluff to Sliven | 5,659.47 mi (9,108.04 km) |
