| North Potomac to Popovo | 5,006.29 mi (8,056.84 km) |
| North Potomac to Provadia | 5,060.95 mi (8,144.81 km) |
| North Potomac to Radnevo | 5,038.64 mi (8,108.92 km) |
| North Potomac to Radomir | 4,906.66 mi (7,896.50 km) |
| North Potomac to Rakitovo | 4,976.53 mi (8,008.95 km) |
| North Potomac to Rakovski | 4,999.90 mi (8,046.56 km) |
| North Potomac to Razgrad | 5,009.78 mi (8,062.47 km) |
| North Potomac to Razlog | 4,955.26 mi (7,974.71 km) |
| North Potomac to Ruse | 4,975.29 mi (8,006.95 km) |
| North Potomac to Samokov | 4,940.24 mi (7,950.55 km) |
| North Potomac to Sandanski | 4,960.59 mi (7,983.30 km) |
| North Potomac to Sevlievo | 4,975.08 mi (8,006.62 km) |
| North Potomac to Shumen | 5,036.90 mi (8,106.10 km) |
| North Potomac to Silistra | 5,014.25 mi (8,069.66 km) |
| North Potomac to Sliven | 5,038.50 mi (8,108.68 km) |
