| Tuscaloosa to Popovo | 5,697.65 mi (9,169.48 km) |
| Tuscaloosa to Provadia | 5,751.39 mi (9,255.97 km) |
| Tuscaloosa to Radnevo | 5,731.96 mi (9,224.70 km) |
| Tuscaloosa to Radomir | 5,602.05 mi (9,015.63 km) |
| Tuscaloosa to Rakitovo | 5,671.83 mi (9,127.92 km) |
| Tuscaloosa to Rakovski | 5,694.06 mi (9,163.71 km) |
| Tuscaloosa to Razgrad | 5,700.56 mi (9,174.16 km) |
| Tuscaloosa to Razlog | 5,651.14 mi (9,094.64 km) |
| Tuscaloosa to Ruse | 5,666.12 mi (9,118.73 km) |
| Tuscaloosa to Samokov | 5,635.47 mi (9,069.41 km) |
| Tuscaloosa to Sandanski | 5,657.01 mi (9,104.07 km) |
| Tuscaloosa to Sevlievo | 5,668.01 mi (9,121.79 km) |
| Tuscaloosa to Shumen | 5,727.68 mi (9,217.81 km) |
| Tuscaloosa to Silistra | 5,703.21 mi (9,178.43 km) |
| Tuscaloosa to Sliven | 5,730.86 mi (9,222.92 km) |
