| Auburn to Popovo | 5,649.52 mi (9,092.03 km) |
| Auburn to Provadia | 5,704.13 mi (9,179.90 km) |
| Auburn to Radnevo | 5,681.88 mi (9,144.10 km) |
| Auburn to Radomir | 5,549.65 mi (8,931.30 km) |
| Auburn to Rakitovo | 5,619.53 mi (9,043.76 km) |
| Auburn to Rakovski | 5,643.06 mi (9,081.64 km) |
| Auburn to Razgrad | 5,652.99 mi (9,097.60 km) |
| Auburn to Razlog | 5,598.13 mi (9,009.32 km) |
| Auburn to Ruse | 5,618.49 mi (9,042.09 km) |
| Auburn to Samokov | 5,583.26 mi (8,985.39 km) |
| Auburn to Sandanski | 5,603.32 mi (9,017.67 km) |
| Auburn to Sevlievo | 5,618.33 mi (9,041.84 km) |
| Auburn to Shumen | 5,680.10 mi (9,141.24 km) |
| Auburn to Silistra | 5,657.27 mi (9,104.49 km) |
| Auburn to Sliven | 5,681.76 mi (9,143.91 km) |
