| Dundalk to Popovo | 4,968.61 mi (7,996.20 km) |
| Dundalk to Provadia | 5,023.40 mi (8,084.37 km) |
| Dundalk to Radnevo | 5,000.66 mi (8,047.78 km) |
| Dundalk to Radomir | 4,868.33 mi (7,834.82 km) |
| Dundalk to Rakitovo | 4,938.21 mi (7,947.29 km) |
| Dundalk to Rakovski | 4,961.77 mi (7,985.20 km) |
| Dundalk to Razgrad | 4,972.19 mi (8,001.97 km) |
| Dundalk to Razlog | 4,916.83 mi (7,912.88 km) |
| Dundalk to Ruse | 4,937.69 mi (7,946.44 km) |
| Dundalk to Samokov | 4,901.94 mi (7,888.91 km) |
| Dundalk to Sandanski | 4,922.07 mi (7,921.31 km) |
| Dundalk to Sevlievo | 4,937.16 mi (7,945.59 km) |
| Dundalk to Shumen | 4,999.30 mi (8,045.59 km) |
| Dundalk to Silistra | 4,976.92 mi (8,009.58 km) |
| Dundalk to Sliven | 5,000.66 mi (8,047.79 km) |
