| Port Laoise to Popovo | 1,663.81 mi (2,677.64 km) |
| Port Laoise to Provadia | 1,719.65 mi (2,767.51 km) |
| Port Laoise to Radnevo | 1,694.71 mi (2,727.37 km) |
| Port Laoise to Radomir | 1,563.80 mi (2,516.70 km) |
| Port Laoise to Rakitovo | 1,633.54 mi (2,628.93 km) |
| Port Laoise to Rakovski | 1,656.01 mi (2,665.09 km) |
| Port Laoise to Razgrad | 1,668.10 mi (2,684.54 km) |
| Port Laoise to Razlog | 1,613.20 mi (2,596.19 km) |
| Port Laoise to Ruse | 1,633.58 mi (2,628.99 km) |
| Port Laoise to Samokov | 1,597.16 mi (2,570.39 km) |
| Port Laoise to Sandanski | 1,619.67 mi (2,606.61 km) |
| Port Laoise to Sevlievo | 1,631.28 mi (2,625.29 km) |
| Port Laoise to Shumen | 1,695.14 mi (2,728.07 km) |
| Port Laoise to Silistra | 1,675.84 mi (2,697.00 km) |
| Port Laoise to Sliven | 1,695.01 mi (2,727.86 km) |
