| Wallingford to Popovo | 1,388.34 mi (2,234.32 km) |
| Wallingford to Provadia | 1,444.94 mi (2,325.40 km) |
| Wallingford to Radnevo | 1,417.55 mi (2,281.33 km) |
| Wallingford to Radomir | 1,285.38 mi (2,068.62 km) |
| Wallingford to Rakitovo | 1,355.18 mi (2,180.94 km) |
| Wallingford to Rakovski | 1,378.29 mi (2,218.14 km) |
| Wallingford to Razgrad | 1,393.19 mi (2,242.12 km) |
| Wallingford to Razlog | 1,334.58 mi (2,147.80 km) |
| Wallingford to Ruse | 1,358.70 mi (2,186.61 km) |
| Wallingford to Samokov | 1,318.83 mi (2,122.45 km) |
| Wallingford to Sandanski | 1,340.90 mi (2,157.98 km) |
| Wallingford to Sevlievo | 1,354.47 mi (2,179.82 km) |
| Wallingford to Shumen | 1,420.16 mi (2,285.53 km) |
| Wallingford to Silistra | 1,402.81 mi (2,257.61 km) |
| Wallingford to Sliven | 1,418.61 mi (2,283.04 km) |
