| Irun to Popovo | 1,401.37 mi (2,255.28 km) |
| Irun to Provadia | 1,462.82 mi (2,354.19 km) |
| Irun to Radnevo | 1,400.33 mi (2,253.61 km) |
| Irun to Radomir | 1,247.83 mi (2,008.19 km) |
| Irun to Rakitovo | 1,312.61 mi (2,112.44 km) |
| Irun to Rakovski | 1,352.17 mi (2,176.11 km) |
| Irun to Razgrad | 1,413.30 mi (2,274.49 km) |
| Irun to Razlog | 1,283.27 mi (2,065.22 km) |
| Irun to Ruse | 1,382.44 mi (2,224.83 km) |
| Irun to Samokov | 1,280.99 mi (2,061.56 km) |
| Irun to Sandanski | 1,279.10 mi (2,058.50 km) |
| Irun to Sevlievo | 1,349.66 mi (2,172.06 km) |
| Irun to Shumen | 1,436.82 mi (2,312.34 km) |
| Irun to Silistra | 1,443.87 mi (2,323.68 km) |
| Irun to Sliven | 1,414.79 mi (2,276.89 km) |
