| Middlesex to Oswaldtwistle | 3,351.66 mi (5,393.97 km) |
| Middlesex to Oswestry | 3,341.52 mi (5,377.66 km) |
| Middlesex to Otley | 3,376.45 mi (5,433.88 km) |
| Middlesex to Ovenden | 3,371.95 mi (5,426.63 km) |
| Middlesex to Oxford | 3,436.07 mi (5,529.82 km) |
| Middlesex to Oxted | 3,497.88 mi (5,629.30 km) |
| Middlesex to Padbury | 3,443.93 mi (5,542.46 km) |
| Middlesex to Padiham | 3,353.91 mi (5,397.60 km) |
| Middlesex to Paignton | 3,367.88 mi (5,420.08 km) |
| Middlesex to Paisley | 3,238.91 mi (5,212.52 km) |
| Middlesex to Palmers Green | 3,485.72 mi (5,609.73 km) |
| Middlesex to Parkstone | 3,429.56 mi (5,519.35 km) |
| Middlesex to Partick | 3,242.79 mi (5,218.76 km) |
| Middlesex to Patcham | 3,500.75 mi (5,633.92 km) |
| Middlesex to Peebles | 3,288.69 mi (5,292.64 km) |
