| Mentana to Nottingham | 989.61 mi (1,592.62 km) |
| Mentana to Nuneaton | 978.93 mi (1,575.44 km) |
| Mentana to Oadby | 970.42 mi (1,561.74 km) |
| Mentana to Oakengates | 1,017.75 mi (1,637.91 km) |
| Mentana to Oakham | 963.51 mi (1,550.61 km) |
| Mentana to Oldbury | 995.35 mi (1,601.85 km) |
| Mentana to Oldham | 1,046.73 mi (1,684.55 km) |
| Mentana to Ollerton | 997.78 mi (1,605.77 km) |
| Mentana to Olton | 985.62 mi (1,586.21 km) |
| Mentana to Omagh | 1,254.47 mi (2,018.87 km) |
| Mentana to Ormesby | 1,070.25 mi (1,722.40 km) |
| Mentana to Ormskirk | 1,070.99 mi (1,723.59 km) |
| Mentana to Orpington | 876.13 mi (1,409.99 km) |
| Mentana to Ossett | 1,037.55 mi (1,669.78 km) |
| Mentana to Oswaldtwistle | 1,064.38 mi (1,712.95 km) |
