| Celbridge to Popovo | 1,636.81 mi (2,634.19 km) |
| Celbridge to Provadia | 1,692.23 mi (2,723.37 km) |
| Celbridge to Radnevo | 1,668.84 mi (2,685.74 km) |
| Celbridge to Radomir | 1,539.40 mi (2,477.42 km) |
| Celbridge to Rakitovo | 1,609.02 mi (2,589.47 km) |
| Celbridge to Rakovski | 1,630.69 mi (2,624.34 km) |
| Celbridge to Razgrad | 1,640.79 mi (2,640.59 km) |
| Celbridge to Razlog | 1,589.16 mi (2,557.50 km) |
| Celbridge to Ruse | 1,606.27 mi (2,585.04 km) |
| Celbridge to Samokov | 1,572.61 mi (2,530.88 km) |
| Celbridge to Sandanski | 1,596.07 mi (2,568.62 km) |
| Celbridge to Sevlievo | 1,605.16 mi (2,583.26 km) |
| Celbridge to Shumen | 1,667.86 mi (2,684.17 km) |
| Celbridge to Silistra | 1,647.65 mi (2,651.64 km) |
| Celbridge to Sliven | 1,668.58 mi (2,685.32 km) |
