| Didcot to Popovo | 1,393.29 mi (2,242.29 km) |
| Didcot to Provadia | 1,449.90 mi (2,333.39 km) |
| Didcot to Radnevo | 1,422.47 mi (2,289.24 km) |
| Didcot to Radomir | 1,290.24 mi (2,076.44 km) |
| Didcot to Rakitovo | 1,360.03 mi (2,188.76 km) |
| Didcot to Rakovski | 1,383.18 mi (2,226.01 km) |
| Didcot to Razgrad | 1,398.15 mi (2,250.11 km) |
| Didcot to Razlog | 1,339.42 mi (2,155.58 km) |
| Didcot to Ruse | 1,363.66 mi (2,194.60 km) |
| Didcot to Samokov | 1,323.69 mi (2,130.27 km) |
| Didcot to Sandanski | 1,345.71 mi (2,165.72 km) |
| Didcot to Sevlievo | 1,359.40 mi (2,187.74 km) |
| Didcot to Shumen | 1,425.12 mi (2,293.51 km) |
| Didcot to Silistra | 1,407.80 mi (2,265.63 km) |
| Didcot to Sliven | 1,423.55 mi (2,290.98 km) |
