| Marshalltown to Popovo | 5,434.88 mi (8,746.60 km) |
| Marshalltown to Provadia | 5,483.23 mi (8,824.40 km) |
| Marshalltown to Radnevo | 5,479.20 mi (8,817.92 km) |
| Marshalltown to Radomir | 5,363.99 mi (8,632.51 km) |
| Marshalltown to Rakitovo | 5,432.10 mi (8,742.11 km) |
| Marshalltown to Rakovski | 5,446.87 mi (8,765.89 km) |
| Marshalltown to Razgrad | 5,434.77 mi (8,746.42 km) |
| Marshalltown to Razlog | 5,415.72 mi (8,715.75 km) |
| Marshalltown to Ruse | 5,401.14 mi (8,692.30 km) |
| Marshalltown to Samokov | 5,395.80 mi (8,683.70 km) |
| Marshalltown to Sandanski | 5,425.23 mi (8,731.06 km) |
| Marshalltown to Sevlievo | 5,414.06 mi (8,713.08 km) |
| Marshalltown to Shumen | 5,461.54 mi (8,789.49 km) |
| Marshalltown to Silistra | 5,428.75 mi (8,736.73 km) |
| Marshalltown to Sliven | 5,472.80 mi (8,807.62 km) |
