| Ann Arbor to Popovo | 5,102.88 mi (8,212.29 km) |
| Ann Arbor to Provadia | 5,154.34 mi (8,295.10 km) |
| Ann Arbor to Radnevo | 5,141.95 mi (8,275.17 km) |
| Ann Arbor to Radomir | 5,018.67 mi (8,076.76 km) |
| Ann Arbor to Rakitovo | 5,087.86 mi (8,188.11 km) |
| Ann Arbor to Rakovski | 5,106.57 mi (8,218.23 km) |
| Ann Arbor to Razgrad | 5,104.42 mi (8,214.77 km) |
| Ann Arbor to Razlog | 5,069.21 mi (8,158.11 km) |
| Ann Arbor to Ruse | 5,070.24 mi (8,159.76 km) |
| Ann Arbor to Samokov | 5,051.41 mi (8,129.46 km) |
| Ann Arbor to Sandanski | 5,076.89 mi (8,170.47 km) |
| Ann Arbor to Sevlievo | 5,077.23 mi (8,171.02 km) |
| Ann Arbor to Shumen | 5,131.46 mi (8,258.29 km) |
| Ann Arbor to Silistra | 5,103.19 mi (8,212.79 km) |
| Ann Arbor to Sliven | 5,138.36 mi (8,269.40 km) |
