| Cedar Rapids to Popovo | 5,397.31 mi (8,686.12 km) |
| Cedar Rapids to Provadia | 5,446.15 mi (8,764.73 km) |
| Cedar Rapids to Radnevo | 5,440.85 mi (8,756.20 km) |
| Cedar Rapids to Radomir | 5,324.35 mi (8,568.71 km) |
| Cedar Rapids to Rakitovo | 5,392.65 mi (8,678.64 km) |
| Cedar Rapids to Rakovski | 5,408.04 mi (8,703.40 km) |
| Cedar Rapids to Razgrad | 5,397.44 mi (8,686.35 km) |
| Cedar Rapids to Razlog | 5,375.92 mi (8,651.70 km) |
| Cedar Rapids to Ruse | 5,363.72 mi (8,632.07 km) |
| Cedar Rapids to Samokov | 5,356.32 mi (8,620.16 km) |
| Cedar Rapids to Sandanski | 5,385.15 mi (8,666.56 km) |
| Cedar Rapids to Sevlievo | 5,375.74 mi (8,651.41 km) |
| Cedar Rapids to Shumen | 5,424.27 mi (8,729.51 km) |
| Cedar Rapids to Silistra | 5,392.15 mi (8,677.82 km) |
| Cedar Rapids to Sliven | 5,434.87 mi (8,746.58 km) |
