| Sumner to Devnya | 5,922.08 mi (9,530.66 km) |
| Sumner to Dimitrovgrad | 5,962.27 mi (9,595.35 km) |
| Sumner to Dobrich | 5,903.92 mi (9,501.44 km) |
| Sumner to Dospat | 5,960.69 mi (9,592.81 km) |
| Sumner to Dupnitsa | 5,900.85 mi (9,496.50 km) |
| Sumner to Elhovo | 5,972.45 mi (9,611.73 km) |
| Sumner to Etropole | 5,881.77 mi (9,465.80 km) |
| Sumner to Gabrovo | 5,904.76 mi (9,502.80 km) |
| Sumner to Gorna Oryahovitsa | 5,894.34 mi (9,486.03 km) |
| Sumner to Gotse Delchev | 5,957.54 mi (9,587.73 km) |
| Sumner to Harmanli | 5,975.35 mi (9,616.39 km) |
| Sumner to Haskovo | 5,969.17 mi (9,606.44 km) |
| Sumner to Ihtiman | 5,903.53 mi (9,500.82 km) |
| Sumner to Isperih | 5,876.93 mi (9,458.00 km) |
| Sumner to Kardzhali | 5,983.65 mi (9,629.76 km) |
