| Aspen Hill to Popovo | 5,000.26 mi (8,047.14 km) |
| Aspen Hill to Provadia | 5,054.96 mi (8,135.18 km) |
| Aspen Hill to Radnevo | 5,032.52 mi (8,099.06 km) |
| Aspen Hill to Radomir | 4,900.42 mi (7,886.46 km) |
| Aspen Hill to Rakitovo | 4,970.29 mi (7,998.91 km) |
| Aspen Hill to Rakovski | 4,993.73 mi (8,036.62 km) |
| Aspen Hill to Razgrad | 5,003.79 mi (8,052.82 km) |
| Aspen Hill to Razlog | 4,948.98 mi (7,964.62 km) |
| Aspen Hill to Ruse | 4,969.29 mi (7,997.29 km) |
| Aspen Hill to Samokov | 4,934.01 mi (7,940.53 km) |
| Aspen Hill to Sandanski | 4,954.29 mi (7,973.15 km) |
| Aspen Hill to Sevlievo | 4,968.98 mi (7,996.80 km) |
| Aspen Hill to Shumen | 5,030.90 mi (8,096.45 km) |
| Aspen Hill to Silistra | 5,008.34 mi (8,060.14 km) |
| Aspen Hill to Sliven | 5,032.42 mi (8,098.90 km) |
