| East Riverdale to Popovo | 4,999.56 mi (8,046.01 km) |
| East Riverdale to Provadia | 5,054.35 mi (8,134.19 km) |
| East Riverdale to Radnevo | 5,031.58 mi (8,097.55 km) |
| East Riverdale to Radomir | 4,899.22 mi (7,884.53 km) |
| East Riverdale to Rakitovo | 4,969.10 mi (7,997.00 km) |
| East Riverdale to Rakovski | 4,992.68 mi (8,034.95 km) |
| East Riverdale to Razgrad | 5,003.14 mi (8,051.78 km) |
| East Riverdale to Razlog | 4,947.71 mi (7,962.57 km) |
| East Riverdale to Ruse | 4,968.64 mi (7,996.25 km) |
| East Riverdale to Samokov | 4,932.83 mi (7,938.63 km) |
| East Riverdale to Sandanski | 4,952.93 mi (7,970.97 km) |
| East Riverdale to Sevlievo | 4,968.09 mi (7,995.37 km) |
| East Riverdale to Shumen | 5,030.25 mi (8,095.41 km) |
| East Riverdale to Silistra | 5,007.88 mi (8,059.41 km) |
| East Riverdale to Sliven | 5,031.60 mi (8,097.58 km) |
