| Irthlingborough to Sycow | 784.24 mi (1,262.10 km) |
| Irthlingborough to Szamotuly | 722.50 mi (1,162.75 km) |
| Irthlingborough to Szczecin | 635.63 mi (1,022.95 km) |
| Irthlingborough to Szczecinek | 723.48 mi (1,164.32 km) |
| Irthlingborough to Szczytno | 899.77 mi (1,448.05 km) |
| Irthlingborough to Szprotawa | 688.26 mi (1,107.65 km) |
| Irthlingborough to Sztum | 819.39 mi (1,318.68 km) |
| Irthlingborough to Szubin | 768.79 mi (1,237.25 km) |
| Irthlingborough to Szydlowiec | 917.24 mi (1,476.15 km) |
| Irthlingborough to Tarnobrzeg | 963.62 mi (1,550.79 km) |
| Irthlingborough to Tarnow | 945.76 mi (1,522.05 km) |
| Irthlingborough to Tarnowskie Gory | 846.99 mi (1,363.09 km) |
| Irthlingborough to Tczew | 809.84 mi (1,303.31 km) |
| Irthlingborough to Tomaszow Lubelski | 1,039.33 mi (1,672.64 km) |
| Irthlingborough to Tomaszow Mazowiecki | 877.93 mi (1,412.89 km) |
