| Great Falls to Popovo | 5,647.37 mi (9,088.56 km) |
| Great Falls to Provadia | 5,685.11 mi (9,149.30 km) |
| Great Falls to Radnevo | 5,704.70 mi (9,180.82 km) |
| Great Falls to Radomir | 5,617.06 mi (9,039.79 km) |
| Great Falls to Rakitovo | 5,679.38 mi (9,140.08 km) |
| Great Falls to Rakovski | 5,682.31 mi (9,144.79 km) |
| Great Falls to Razgrad | 5,642.65 mi (9,080.98 km) |
| Great Falls to Razlog | 5,670.17 mi (9,125.26 km) |
| Great Falls to Ruse | 5,611.92 mi (9,031.51 km) |
| Great Falls to Samokov | 5,644.94 mi (9,084.65 km) |
| Great Falls to Sandanski | 5,684.61 mi (9,148.49 km) |
| Great Falls to Sevlievo | 5,640.91 mi (9,078.18 km) |
| Great Falls to Shumen | 5,667.57 mi (9,121.07 km) |
| Great Falls to Silistra | 5,623.62 mi (9,050.34 km) |
| Great Falls to Sliven | 5,690.59 mi (9,158.12 km) |
