| Tucson to Popovo | 6,558.24 mi (10,554.47 km) |
| Tucson to Provadia | 6,602.23 mi (10,625.26 km) |
| Tucson to Radnevo | 6,608.51 mi (10,635.36 km) |
| Tucson to Radomir | 6,503.76 mi (10,466.79 km) |
| Tucson to Rakitovo | 6,570.04 mi (10,573.46 km) |
| Tucson to Rakovski | 6,580.11 mi (10,589.66 km) |
| Tucson to Razgrad | 6,556.10 mi (10,551.02 km) |
| Tucson to Razlog | 6,556.39 mi (10,551.49 km) |
| Tucson to Ruse | 6,523.50 mi (10,498.56 km) |
| Tucson to Samokov | 6,534.23 mi (10,515.83 km) |
| Tucson to Sandanski | 6,567.88 mi (10,569.98 km) |
| Tucson to Sevlievo | 6,543.47 mi (10,530.69 km) |
| Tucson to Shumen | 6,582.24 mi (10,593.09 km) |
| Tucson to Silistra | 6,544.15 mi (10,531.80 km) |
| Tucson to Sliven | 6,598.75 mi (10,619.67 km) |
