| Castro Daire to Popovo | 1,746.76 mi (2,811.14 km) |
| Castro Daire to Provadia | 1,808.07 mi (2,909.81 km) |
| Castro Daire to Radnevo | 1,740.93 mi (2,801.75 km) |
| Castro Daire to Radomir | 1,587.82 mi (2,555.36 km) |
| Castro Daire to Rakitovo | 1,650.29 mi (2,655.89 km) |
| Castro Daire to Rakovski | 1,692.08 mi (2,723.14 km) |
| Castro Daire to Razgrad | 1,759.53 mi (2,831.69 km) |
| Castro Daire to Razlog | 1,619.91 mi (2,607.00 km) |
| Castro Daire to Ruse | 1,729.59 mi (2,783.50 km) |
| Castro Daire to Samokov | 1,620.22 mi (2,607.49 km) |
| Castro Daire to Sandanski | 1,613.74 mi (2,597.06 km) |
| Castro Daire to Sevlievo | 1,693.16 mi (2,724.88 km) |
| Castro Daire to Shumen | 1,782.24 mi (2,868.24 km) |
| Castro Daire to Silistra | 1,792.46 mi (2,884.69 km) |
| Castro Daire to Sliven | 1,757.40 mi (2,828.26 km) |
