| Walton upon Thames to Popovo | 1,355.14 mi (2,180.89 km) |
| Walton upon Thames to Provadia | 1,411.86 mi (2,272.18 km) |
| Walton upon Thames to Radnevo | 1,384.04 mi (2,227.40 km) |
| Walton upon Thames to Radomir | 1,251.61 mi (2,014.27 km) |
| Walton upon Thames to Rakitovo | 1,321.41 mi (2,126.61 km) |
| Walton upon Thames to Rakovski | 1,344.66 mi (2,164.02 km) |
| Walton upon Thames to Razgrad | 1,360.09 mi (2,188.85 km) |
| Walton upon Thames to Razlog | 1,300.76 mi (2,093.37 km) |
| Walton upon Thames to Ruse | 1,325.61 mi (2,133.36 km) |
| Walton upon Thames to Samokov | 1,285.08 mi (2,068.13 km) |
| Walton upon Thames to Sandanski | 1,307.03 mi (2,103.47 km) |
| Walton upon Thames to Sevlievo | 1,321.03 mi (2,125.99 km) |
| Walton upon Thames to Shumen | 1,387.04 mi (2,232.23 km) |
| Walton upon Thames to Silistra | 1,370.04 mi (2,204.86 km) |
| Walton upon Thames to Sliven | 1,385.24 mi (2,229.33 km) |
