| Trowbridge to Popovo | 1,429.72 mi (2,300.91 km) |
| Trowbridge to Provadia | 1,486.79 mi (2,392.76 km) |
| Trowbridge to Radnevo | 1,457.47 mi (2,345.57 km) |
| Trowbridge to Radomir | 1,323.49 mi (2,129.95 km) |
| Trowbridge to Rakitovo | 1,393.37 mi (2,242.42 km) |
| Trowbridge to Rakovski | 1,417.53 mi (2,281.30 km) |
| Trowbridge to Razgrad | 1,434.95 mi (2,309.33 km) |
| Trowbridge to Razlog | 1,372.16 mi (2,208.28 km) |
| Trowbridge to Ruse | 1,400.50 mi (2,253.88 km) |
| Trowbridge to Samokov | 1,357.11 mi (2,184.06 km) |
| Trowbridge to Sandanski | 1,377.90 mi (2,217.51 km) |
| Trowbridge to Sevlievo | 1,394.77 mi (2,244.66 km) |
| Trowbridge to Shumen | 1,461.86 mi (2,352.63 km) |
| Trowbridge to Silistra | 1,445.64 mi (2,326.53 km) |
| Trowbridge to Sliven | 1,459.25 mi (2,348.43 km) |
