| Highgate to Opole | 784.52 mi (1,262.56 km) |
| Highgate to Orzesze | 827.52 mi (1,331.77 km) |
| Highgate to Osowa | 796.22 mi (1,281.40 km) |
| Highgate to Ostroda | 853.03 mi (1,372.82 km) |
| Highgate to Ostroleka | 919.18 mi (1,479.28 km) |
| Highgate to Ostrow Mazowiecka | 933.99 mi (1,503.12 km) |
| Highgate to Ostrow Wielkopolski | 768.74 mi (1,237.17 km) |
| Highgate to Ostrowiec Swietokrzyski | 929.37 mi (1,495.67 km) |
| Highgate to Ostrzeszow | 775.76 mi (1,248.46 km) |
| Highgate to Oswiecim | 849.68 mi (1,367.43 km) |
| Highgate to Otwock | 911.43 mi (1,466.80 km) |
| Highgate to Ozarow Mazowiecki | 891.05 mi (1,434.01 km) |
| Highgate to Ozimek | 796.44 mi (1,281.74 km) |
| Highgate to Ozorkow | 828.67 mi (1,333.61 km) |
| Highgate to Pabianice | 835.41 mi (1,344.46 km) |
