| Storm Lake to Popovo | 5,477.34 mi (8,814.93 km) |
| Storm Lake to Provadia | 5,524.53 mi (8,890.87 km) |
| Storm Lake to Radnevo | 5,523.42 mi (8,889.09 km) |
| Storm Lake to Radomir | 5,411.26 mi (8,708.59 km) |
| Storm Lake to Rakitovo | 5,478.87 mi (8,817.38 km) |
| Storm Lake to Rakovski | 5,492.22 mi (8,838.88 km) |
| Storm Lake to Razgrad | 5,476.66 mi (8,813.83 km) |
| Storm Lake to Razlog | 5,463.32 mi (8,792.37 km) |
| Storm Lake to Ruse | 5,443.28 mi (8,760.12 km) |
| Storm Lake to Samokov | 5,442.69 mi (8,759.16 km) |
| Storm Lake to Sandanski | 5,473.47 mi (8,808.70 km) |
| Storm Lake to Sevlievo | 5,458.24 mi (8,784.19 km) |
| Storm Lake to Shumen | 5,503.28 mi (8,856.68 km) |
| Storm Lake to Silistra | 5,469.00 mi (8,801.51 km) |
| Storm Lake to Sliven | 5,516.04 mi (8,877.21 km) |
