| Northolt to Orthez | 557.11 mi (896.58 km) |
| Northolt to Orvault | 300.68 mi (483.90 km) |
| Northolt to Osny | 202.61 mi (326.08 km) |
| Northolt to Ostwald | 413.75 mi (665.86 km) |
| Northolt to Ouistreham | 156.75 mi (252.26 km) |
| Northolt to Oullins | 466.92 mi (751.43 km) |
| Northolt to Outreau | 103.16 mi (166.02 km) |
| Northolt to Oyonnax | 456.31 mi (734.36 km) |
| Northolt to Ozoir-la-Ferriere | 234.09 mi (376.73 km) |
| Northolt to Pace | 243.02 mi (391.10 km) |
| Northolt to Palaiseau | 227.37 mi (365.92 km) |
| Northolt to Pamiers | 589.76 mi (949.12 km) |
| Northolt to Panazol | 401.72 mi (646.50 km) |
| Northolt to Pantin | 220.28 mi (354.51 km) |
| Northolt to Paray-le-Monial | 406.47 mi (654.16 km) |
