| Oak Ridge to Devnya | 5,491.81 mi (8,838.21 km) |
| Oak Ridge to Dimitrovgrad | 5,466.35 mi (8,797.23 km) |
| Oak Ridge to Dobrich | 5,486.41 mi (8,829.52 km) |
| Oak Ridge to Dospat | 5,426.18 mi (8,732.60 km) |
| Oak Ridge to Dupnitsa | 5,357.58 mi (8,622.20 km) |
| Oak Ridge to Elhovo | 5,499.48 mi (8,850.55 km) |
| Oak Ridge to Etropole | 5,368.84 mi (8,640.31 km) |
| Oak Ridge to Gabrovo | 5,420.24 mi (8,723.03 km) |
| Oak Ridge to Gorna Oryahovitsa | 5,423.05 mi (8,727.55 km) |
| Oak Ridge to Gotse Delchev | 5,412.18 mi (8,710.07 km) |
| Oak Ridge to Harmanli | 5,483.37 mi (8,824.64 km) |
| Oak Ridge to Haskovo | 5,470.12 mi (8,803.30 km) |
| Oak Ridge to Ihtiman | 5,378.38 mi (8,655.67 km) |
| Oak Ridge to Isperih | 5,441.44 mi (8,757.14 km) |
| Oak Ridge to Kardzhali | 5,474.49 mi (8,810.33 km) |
