| Langley Park to Popovo | 5,000.97 mi (8,048.28 km) |
| Langley Park to Provadia | 5,055.74 mi (8,136.42 km) |
| Langley Park to Radnevo | 5,033.07 mi (8,099.94 km) |
| Langley Park to Radomir | 4,900.79 mi (7,887.05 km) |
| Langley Park to Rakitovo | 4,970.67 mi (7,999.52 km) |
| Langley Park to Rakovski | 4,994.20 mi (8,037.39 km) |
| Langley Park to Razgrad | 5,004.54 mi (8,054.03 km) |
| Langley Park to Razlog | 4,949.30 mi (7,965.13 km) |
| Langley Park to Ruse | 4,970.04 mi (7,998.50 km) |
| Langley Park to Samokov | 4,934.39 mi (7,941.14 km) |
| Langley Park to Sandanski | 4,954.55 mi (7,973.57 km) |
| Langley Park to Sevlievo | 4,969.56 mi (7,997.74 km) |
| Langley Park to Shumen | 5,031.65 mi (8,097.66 km) |
| Langley Park to Silistra | 5,009.22 mi (8,061.56 km) |
| Langley Park to Sliven | 5,033.05 mi (8,099.92 km) |
