| Fitchburg to Popovo | 4,634.08 mi (7,457.83 km) |
| Fitchburg to Provadia | 4,688.75 mi (7,545.81 km) |
| Fitchburg to Radnevo | 4,666.50 mi (7,510.01 km) |
| Fitchburg to Radomir | 4,534.75 mi (7,297.98 km) |
| Fitchburg to Rakitovo | 4,604.61 mi (7,410.40 km) |
| Fitchburg to Rakovski | 4,627.83 mi (7,447.77 km) |
| Fitchburg to Razgrad | 4,637.58 mi (7,463.46 km) |
| Fitchburg to Razlog | 4,583.44 mi (7,376.33 km) |
| Fitchburg to Ruse | 4,603.08 mi (7,407.94 km) |
| Fitchburg to Samokov | 4,568.31 mi (7,351.98 km) |
| Fitchburg to Sandanski | 4,588.89 mi (7,385.10 km) |
| Fitchburg to Sevlievo | 4,602.92 mi (7,407.68 km) |
| Fitchburg to Shumen | 4,664.69 mi (7,507.10 km) |
| Fitchburg to Silistra | 4,642.11 mi (7,470.75 km) |
| Fitchburg to Sliven | 4,666.31 mi (7,509.70 km) |
