| Hartford to Devnya | 4,763.12 mi (7,665.49 km) |
| Hartford to Dimitrovgrad | 4,733.58 mi (7,617.95 km) |
| Hartford to Dobrich | 4,758.70 mi (7,658.39 km) |
| Hartford to Dospat | 4,691.55 mi (7,550.33 km) |
| Hartford to Dupnitsa | 4,622.98 mi (7,439.97 km) |
| Hartford to Elhovo | 4,767.83 mi (7,673.08 km) |
| Hartford to Etropole | 4,635.85 mi (7,460.68 km) |
| Hartford to Gabrovo | 4,688.56 mi (7,545.50 km) |
| Hartford to Gorna Oryahovitsa | 4,692.19 mi (7,551.36 km) |
| Hartford to Gotse Delchev | 4,677.09 mi (7,527.05 km) |
| Hartford to Harmanli | 4,750.70 mi (7,645.51 km) |
| Hartford to Haskovo | 4,737.13 mi (7,623.67 km) |
| Hartford to Ihtiman | 4,644.62 mi (7,474.79 km) |
| Hartford to Isperih | 4,712.88 mi (7,584.64 km) |
| Hartford to Kardzhali | 4,740.88 mi (7,629.71 km) |
