| Front Royal to Popovo | 5,051.72 mi (8,129.96 km) |
| Front Royal to Provadia | 5,106.19 mi (8,217.62 km) |
| Front Royal to Radnevo | 5,084.52 mi (8,182.75 km) |
| Front Royal to Radomir | 4,953.04 mi (7,971.15 km) |
| Front Royal to Rakitovo | 5,022.89 mi (8,083.56 km) |
| Front Royal to Rakovski | 5,045.98 mi (8,120.71 km) |
| Front Royal to Razgrad | 5,055.09 mi (8,135.39 km) |
| Front Royal to Razlog | 5,001.77 mi (8,049.57 km) |
| Front Royal to Ruse | 5,020.60 mi (8,079.88 km) |
| Front Royal to Samokov | 4,986.58 mi (8,025.13 km) |
| Front Royal to Sandanski | 5,007.25 mi (8,058.39 km) |
| Front Royal to Sevlievo | 5,020.87 mi (8,080.31 km) |
| Front Royal to Shumen | 5,082.21 mi (8,179.03 km) |
| Front Royal to Silistra | 5,059.18 mi (8,141.97 km) |
| Front Royal to Sliven | 5,084.16 mi (8,182.16 km) |
