| Greenford to Orthez | 555.98 mi (894.76 km) |
| Greenford to Orvault | 299.72 mi (482.36 km) |
| Greenford to Osny | 201.14 mi (323.71 km) |
| Greenford to Ostwald | 412.41 mi (663.71 km) |
| Greenford to Ouistreham | 155.56 mi (250.35 km) |
| Greenford to Oullins | 465.45 mi (749.07 km) |
| Greenford to Outreau | 101.76 mi (163.77 km) |
| Greenford to Oyonnax | 454.84 mi (731.99 km) |
| Greenford to Ozoir-la-Ferriere | 232.62 mi (374.36 km) |
| Greenford to Pace | 242.14 mi (389.69 km) |
| Greenford to Palaiseau | 225.91 mi (363.56 km) |
| Greenford to Pamiers | 588.46 mi (947.03 km) |
| Greenford to Panazol | 400.40 mi (644.37 km) |
| Greenford to Pantin | 218.81 mi (352.14 km) |
| Greenford to Paray-le-Monial | 405.01 mi (651.80 km) |
