| Borehamwood to Opole | 789.74 mi (1,270.96 km) |
| Borehamwood to Orzesze | 832.94 mi (1,340.49 km) |
| Borehamwood to Osowa | 799.14 mi (1,286.09 km) |
| Borehamwood to Ostroda | 856.44 mi (1,378.31 km) |
| Borehamwood to Ostroleka | 922.95 mi (1,485.34 km) |
| Borehamwood to Ostrow Mazowiecka | 937.90 mi (1,509.40 km) |
| Borehamwood to Ostrow Wielkopolski | 773.41 mi (1,244.69 km) |
| Borehamwood to Ostrowiec Swietokrzyski | 934.23 mi (1,503.49 km) |
| Borehamwood to Ostrzeszow | 780.56 mi (1,256.19 km) |
| Borehamwood to Oswiecim | 855.12 mi (1,376.18 km) |
| Borehamwood to Otwock | 915.71 mi (1,473.69 km) |
| Borehamwood to Ozarow Mazowiecki | 895.29 mi (1,440.84 km) |
| Borehamwood to Ozimek | 801.63 mi (1,290.10 km) |
| Borehamwood to Ozorkow | 833.10 mi (1,340.74 km) |
| Borehamwood to Pabianice | 840.01 mi (1,351.87 km) |
