| London Colney to Oerlinghausen | 382.85 mi (616.14 km) |
| London Colney to Oestrich-Winkel | 380.85 mi (612.92 km) |
| London Colney to Offenburg | 428.44 mi (689.51 km) |
| London Colney to Oftersheim | 422.31 mi (679.64 km) |
| London Colney to Ohrdruf | 480.40 mi (773.13 km) |
| London Colney to Ohringen | 464.56 mi (747.64 km) |
| London Colney to Olbernhau | 593.92 mi (955.82 km) |
| London Colney to Olching | 570.06 mi (917.42 km) |
| London Colney to Oldenburg | 371.52 mi (597.91 km) |
| London Colney to Oldenburg in Holstein | 497.07 mi (799.95 km) |
| London Colney to Olfen | 328.71 mi (529.01 km) |
| London Colney to Olpe | 354.03 mi (569.75 km) |
| London Colney to Olsberg | 378.13 mi (608.54 km) |
| London Colney to Oranienburg | 576.26 mi (927.39 km) |
| London Colney to Ortenberg | 416.99 mi (671.08 km) |
