| East Providence to Popovo | 4,649.54 mi (7,482.71 km) |
| East Providence to Provadia | 4,704.63 mi (7,571.37 km) |
| East Providence to Radnevo | 4,680.91 mi (7,533.20 km) |
| East Providence to Radomir | 4,547.94 mi (7,319.21 km) |
| East Providence to Rakitovo | 4,617.84 mi (7,431.70 km) |
| East Providence to Rakovski | 4,641.76 mi (7,470.19 km) |
| East Providence to Razgrad | 4,653.33 mi (7,488.81 km) |
| East Providence to Razlog | 4,596.29 mi (7,397.01 km) |
| East Providence to Ruse | 4,618.81 mi (7,433.26 km) |
| East Providence to Samokov | 4,581.60 mi (7,373.37 km) |
| East Providence to Sandanski | 4,601.37 mi (7,405.19 km) |
| East Providence to Sevlievo | 4,617.56 mi (7,431.25 km) |
| East Providence to Shumen | 4,680.42 mi (7,532.41 km) |
| East Providence to Silistra | 4,658.71 mi (7,497.46 km) |
| East Providence to Sliven | 4,681.24 mi (7,533.73 km) |
