| South Euclid to Popovo | 5,057.64 mi (8,139.49 km) |
| South Euclid to Provadia | 5,110.10 mi (8,223.92 km) |
| South Euclid to Radnevo | 5,094.77 mi (8,199.24 km) |
| South Euclid to Radomir | 4,968.79 mi (7,996.50 km) |
| South Euclid to Rakitovo | 5,038.26 mi (8,108.29 km) |
| South Euclid to Rakovski | 5,058.36 mi (8,140.65 km) |
| South Euclid to Razgrad | 5,059.76 mi (8,142.90 km) |
| South Euclid to Razlog | 5,018.82 mi (8,077.01 km) |
| South Euclid to Ruse | 5,025.45 mi (8,087.68 km) |
| South Euclid to Samokov | 5,001.82 mi (8,049.65 km) |
| South Euclid to Sandanski | 5,025.82 mi (8,088.28 km) |
| South Euclid to Sevlievo | 5,030.33 mi (8,095.53 km) |
| South Euclid to Shumen | 5,086.86 mi (8,186.51 km) |
| South Euclid to Silistra | 5,060.22 mi (8,143.64 km) |
| South Euclid to Sliven | 5,092.20 mi (8,195.10 km) |
