| Stockton-on-Tees to Popovo | 1,456.53 mi (2,344.05 km) |
| Stockton-on-Tees to Provadia | 1,509.31 mi (2,429.00 km) |
| Stockton-on-Tees to Radnevo | 1,494.75 mi (2,405.56 km) |
| Stockton-on-Tees to Radomir | 1,374.46 mi (2,211.99 km) |
| Stockton-on-Tees to Rakitovo | 1,442.97 mi (2,322.23 km) |
| Stockton-on-Tees to Rakovski | 1,459.88 mi (2,349.45 km) |
| Stockton-on-Tees to Razgrad | 1,458.77 mi (2,347.66 km) |
| Stockton-on-Tees to Razlog | 1,425.96 mi (2,294.86 km) |
| Stockton-on-Tees to Ruse | 1,424.42 mi (2,292.38 km) |
| Stockton-on-Tees to Samokov | 1,406.59 mi (2,263.68 km) |
| Stockton-on-Tees to Sandanski | 1,435.31 mi (2,309.92 km) |
| Stockton-on-Tees to Sevlievo | 1,430.01 mi (2,301.38 km) |
| Stockton-on-Tees to Shumen | 1,485.88 mi (2,391.29 km) |
| Stockton-on-Tees to Silistra | 1,460.76 mi (2,350.86 km) |
| Stockton-on-Tees to Sliven | 1,491.32 mi (2,400.04 km) |
