| Barnet to Opole | 786.67 mi (1,266.02 km) |
| Barnet to Orzesze | 829.84 mi (1,335.49 km) |
| Barnet to Osowa | 796.58 mi (1,281.97 km) |
| Barnet to Ostroda | 853.75 mi (1,373.98 km) |
| Barnet to Ostroleka | 920.17 mi (1,480.87 km) |
| Barnet to Ostrow Mazowiecka | 935.09 mi (1,504.88 km) |
| Barnet to Ostrow Wielkopolski | 770.44 mi (1,239.90 km) |
| Barnet to Ostrowiec Swietokrzyski | 931.22 mi (1,498.65 km) |
| Barnet to Ostrzeszow | 777.56 mi (1,251.37 km) |
| Barnet to Oswiecim | 852.01 mi (1,371.18 km) |
| Barnet to Otwock | 912.81 mi (1,469.03 km) |
| Barnet to Ozarow Mazowiecki | 892.41 mi (1,436.20 km) |
| Barnet to Ozimek | 798.56 mi (1,285.16 km) |
| Barnet to Ozorkow | 830.17 mi (1,336.03 km) |
| Barnet to Pabianice | 837.05 mi (1,347.10 km) |
