| London Colney to Opole | 790.76 mi (1,272.60 km) |
| London Colney to Orzesze | 834.12 mi (1,342.38 km) |
| London Colney to Osowa | 798.56 mi (1,285.15 km) |
| London Colney to Ostroda | 856.17 mi (1,377.88 km) |
| London Colney to Ostroleka | 922.92 mi (1,485.29 km) |
| London Colney to Ostrow Mazowiecka | 937.96 mi (1,509.49 km) |
| London Colney to Ostrow Wielkopolski | 774.02 mi (1,245.67 km) |
| London Colney to Ostrowiec Swietokrzyski | 934.97 mi (1,504.69 km) |
| London Colney to Ostrzeszow | 781.27 mi (1,257.33 km) |
| London Colney to Oswiecim | 856.30 mi (1,378.09 km) |
| London Colney to Otwock | 916.03 mi (1,474.21 km) |
| London Colney to Ozarow Mazowiecki | 895.59 mi (1,441.32 km) |
| London Colney to Ozimek | 802.63 mi (1,291.71 km) |
| London Colney to Ozorkow | 833.53 mi (1,341.44 km) |
| London Colney to Pabianice | 840.57 mi (1,352.76 km) |
