| Kardzhali to Nottingham | 1,454.64 mi (2,341.01 km) |
| Kardzhali to Nuneaton | 1,456.38 mi (2,343.82 km) |
| Kardzhali to Oadby | 1,442.83 mi (2,322.01 km) |
| Kardzhali to Oakengates | 1,499.21 mi (2,412.74 km) |
| Kardzhali to Oakham | 1,431.24 mi (2,303.36 km) |
| Kardzhali to Oldbury | 1,477.62 mi (2,378.00 km) |
| Kardzhali to Oldham | 1,506.93 mi (2,425.16 km) |
| Kardzhali to Ollerton | 1,456.07 mi (2,343.32 km) |
| Kardzhali to Olton | 1,467.73 mi (2,362.08 km) |
| Kardzhali to Omagh | 1,728.69 mi (2,782.06 km) |
| Kardzhali to Ormesby | 1,500.03 mi (2,414.07 km) |
| Kardzhali to Ormskirk | 1,536.91 mi (2,473.43 km) |
| Kardzhali to Orpington | 1,366.61 mi (2,199.34 km) |
| Kardzhali to Ossett | 1,490.14 mi (2,398.15 km) |
| Kardzhali to Oswaldtwistle | 1,522.54 mi (2,450.28 km) |
