| Northampton to Nottingham | 51.09 mi (82.22 km) |
| Northampton to Nuneaton | 31.55 mi (50.77 km) |
| Northampton to Oadby | 26.58 mi (42.78 km) |
| Northampton to Oakengates | 72.99 mi (117.46 km) |
| Northampton to Oakham | 31.15 mi (50.13 km) |
| Northampton to Oldbury | 51.00 mi (82.07 km) |
| Northampton to Oldham | 104.12 mi (167.57 km) |
| Northampton to Ollerton | 67.20 mi (108.15 km) |
| Northampton to Olton | 41.08 mi (66.11 km) |
| Northampton to Omagh | 309.62 mi (498.29 km) |
| Northampton to Ormesby | 160.65 mi (258.54 km) |
| Northampton to Ormskirk | 124.18 mi (199.85 km) |
| Northampton to Orpington | 72.79 mi (117.14 km) |
| Northampton to Ossett | 104.15 mi (167.61 km) |
| Northampton to Oswaldtwistle | 121.69 mi (195.85 km) |
