| Sidney to Popovo | 5,215.87 mi (8,394.13 km) |
| Sidney to Provadia | 5,268.02 mi (8,478.07 km) |
| Sidney to Radnevo | 5,253.58 mi (8,454.81 km) |
| Sidney to Radomir | 5,128.31 mi (8,253.22 km) |
| Sidney to Rakitovo | 5,197.72 mi (8,364.92 km) |
| Sidney to Rakovski | 5,217.45 mi (8,396.68 km) |
| Sidney to Razgrad | 5,217.81 mi (8,397.26 km) |
| Sidney to Razlog | 5,178.48 mi (8,333.95 km) |
| Sidney to Ruse | 5,183.54 mi (8,342.10 km) |
| Sidney to Samokov | 5,161.27 mi (8,306.26 km) |
| Sidney to Sandanski | 5,185.65 mi (8,345.50 km) |
| Sidney to Sevlievo | 5,189.05 mi (8,350.97 km) |
| Sidney to Shumen | 5,244.89 mi (8,440.84 km) |
| Sidney to Silistra | 5,217.73 mi (8,397.12 km) |
| Sidney to Sliven | 5,250.71 mi (8,450.20 km) |
