| Hartford to Popovo | 4,704.46 mi (7,571.10 km) |
| Hartford to Provadia | 4,759.25 mi (7,659.28 km) |
| Hartford to Radnevo | 4,736.58 mi (7,622.78 km) |
| Hartford to Radomir | 4,604.43 mi (7,410.11 km) |
| Hartford to Rakitovo | 4,674.30 mi (7,522.56 km) |
| Hartford to Rakovski | 4,697.75 mi (7,560.30 km) |
| Hartford to Razgrad | 4,708.05 mi (7,576.87 km) |
| Hartford to Razlog | 4,653.00 mi (7,488.29 km) |
| Hartford to Ruse | 4,673.54 mi (7,521.34 km) |
| Hartford to Samokov | 4,638.02 mi (7,464.18 km) |
| Hartford to Sandanski | 4,658.33 mi (7,496.85 km) |
| Hartford to Sevlievo | 4,673.06 mi (7,520.57 km) |
| Hartford to Shumen | 4,735.15 mi (7,620.49 km) |
| Hartford to Silistra | 4,712.81 mi (7,584.53 km) |
| Hartford to Sliven | 4,736.54 mi (7,622.73 km) |
