| Irthlingborough to Opole | 803.73 mi (1,293.48 km) |
| Irthlingborough to Orzesze | 848.36 mi (1,365.30 km) |
| Irthlingborough to Osowa | 797.37 mi (1,283.25 km) |
| Irthlingborough to Ostroda | 857.75 mi (1,380.41 km) |
| Irthlingborough to Ostroleka | 926.50 mi (1,491.05 km) |
| Irthlingborough to Ostrow Mazowiecka | 942.34 mi (1,516.55 km) |
| Irthlingborough to Ostrow Wielkopolski | 783.48 mi (1,260.89 km) |
| Irthlingborough to Ostrowiec Swietokrzyski | 945.36 mi (1,521.41 km) |
| Irthlingborough to Ostrzeszow | 791.54 mi (1,273.87 km) |
| Irthlingborough to Oswiecim | 870.62 mi (1,401.13 km) |
| Irthlingborough to Otwock | 922.75 mi (1,485.03 km) |
| Irthlingborough to Ozarow Mazowiecki | 902.12 mi (1,451.82 km) |
| Irthlingborough to Ozimek | 815.43 mi (1,312.30 km) |
| Irthlingborough to Ozorkow | 841.34 mi (1,354.01 km) |
| Irthlingborough to Pabianice | 849.45 mi (1,367.06 km) |
