| Harmanli to Nottingham | 1,462.48 mi (2,353.64 km) |
| Harmanli to Nuneaton | 1,464.97 mi (2,357.65 km) |
| Harmanli to Oadby | 1,451.18 mi (2,335.45 km) |
| Harmanli to Oakengates | 1,507.85 mi (2,426.66 km) |
| Harmanli to Oakham | 1,439.36 mi (2,316.43 km) |
| Harmanli to Oldbury | 1,486.41 mi (2,392.14 km) |
| Harmanli to Oldham | 1,514.24 mi (2,436.93 km) |
| Harmanli to Ollerton | 1,463.51 mi (2,355.29 km) |
| Harmanli to Olton | 1,476.55 mi (2,376.28 km) |
| Harmanli to Omagh | 1,736.01 mi (2,793.84 km) |
| Harmanli to Ormesby | 1,505.57 mi (2,422.98 km) |
| Harmanli to Ormskirk | 1,544.44 mi (2,485.54 km) |
| Harmanli to Orpington | 1,376.44 mi (2,215.17 km) |
| Harmanli to Ossett | 1,497.07 mi (2,409.31 km) |
| Harmanli to Oswaldtwistle | 1,529.65 mi (2,461.74 km) |
