| Irthlingborough to Nowy Dwor Mazowiecki | 896.43 mi (1,442.67 km) |
| Irthlingborough to Nowy Sacz | 942.11 mi (1,516.18 km) |
| Irthlingborough to Nowy Targ | 917.13 mi (1,475.98 km) |
| Irthlingborough to Nowy Tomysl | 705.71 mi (1,135.73 km) |
| Irthlingborough to Nysa | 782.11 mi (1,258.69 km) |
| Irthlingborough to Oborniki | 731.93 mi (1,177.93 km) |
| Irthlingborough to Oborniki Slaskie | 749.71 mi (1,206.55 km) |
| Irthlingborough to Olawa | 772.30 mi (1,242.89 km) |
| Irthlingborough to Olecko | 960.02 mi (1,545.00 km) |
| Irthlingborough to Olesnica | 771.52 mi (1,241.65 km) |
| Irthlingborough to Olesno | 820.44 mi (1,320.38 km) |
| Irthlingborough to Olkusz | 880.06 mi (1,416.32 km) |
| Irthlingborough to Olsztyn | 878.49 mi (1,413.80 km) |
| Irthlingborough to Opalenica | 717.54 mi (1,154.77 km) |
| Irthlingborough to Opoczno | 891.32 mi (1,434.44 km) |
