| Allen to Popovo | 6,043.96 mi (9,726.81 km) |
| Allen to Provadia | 6,094.39 mi (9,807.98 km) |
| Allen to Radnevo | 6,084.69 mi (9,792.37 km) |
| Allen to Radomir | 5,963.44 mi (9,597.22 km) |
| Allen to Rakitovo | 6,032.42 mi (9,708.24 km) |
| Allen to Rakovski | 6,050.14 mi (9,736.77 km) |
| Allen to Razgrad | 6,044.94 mi (9,728.39 km) |
| Allen to Razlog | 6,014.28 mi (9,679.04 km) |
| Allen to Ruse | 6,010.92 mi (9,673.64 km) |
| Allen to Samokov | 5,995.98 mi (9,649.60 km) |
| Allen to Sandanski | 6,022.35 mi (9,692.03 km) |
| Allen to Sevlievo | 6,019.80 mi (9,687.94 km) |
| Allen to Shumen | 6,071.91 mi (9,771.80 km) |
| Allen to Silistra | 6,041.98 mi (9,723.63 km) |
| Allen to Sliven | 6,080.25 mi (9,785.22 km) |
