| Glen Burnie to Popovo | 4,978.38 mi (8,011.93 km) |
| Glen Burnie to Provadia | 5,033.18 mi (8,100.12 km) |
| Glen Burnie to Radnevo | 5,010.40 mi (8,063.45 km) |
| Glen Burnie to Radomir | 4,878.03 mi (7,850.42 km) |
| Glen Burnie to Rakitovo | 4,947.91 mi (7,962.89 km) |
| Glen Burnie to Rakovski | 4,971.49 mi (8,000.85 km) |
| Glen Burnie to Razgrad | 4,981.97 mi (8,017.71 km) |
| Glen Burnie to Razlog | 4,926.52 mi (7,928.46 km) |
| Glen Burnie to Ruse | 4,947.47 mi (7,962.18 km) |
| Glen Burnie to Samokov | 4,911.64 mi (7,904.52 km) |
| Glen Burnie to Sandanski | 4,931.74 mi (7,936.87 km) |
| Glen Burnie to Sevlievo | 4,946.91 mi (7,961.28 km) |
| Glen Burnie to Shumen | 5,009.08 mi (8,061.34 km) |
| Glen Burnie to Silistra | 4,986.73 mi (8,025.36 km) |
| Glen Burnie to Sliven | 5,010.42 mi (8,063.49 km) |
