| Greenbelt to Orthez | 3,825.36 mi (6,156.32 km) |
| Greenbelt to Orvault | 3,688.92 mi (5,936.74 km) |
| Greenbelt to Osny | 3,803.23 mi (6,120.71 km) |
| Greenbelt to Ostwald | 4,053.30 mi (6,523.15 km) |
| Greenbelt to Ouistreham | 3,699.79 mi (5,954.23 km) |
| Greenbelt to Oullins | 4,012.47 mi (6,457.44 km) |
| Greenbelt to Outreau | 3,743.42 mi (6,024.45 km) |
| Greenbelt to Oyonnax | 4,033.44 mi (6,491.20 km) |
| Greenbelt to Ozoir-la-Ferriere | 3,836.47 mi (6,174.20 km) |
| Greenbelt to Pace | 3,661.41 mi (5,892.47 km) |
| Greenbelt to Palaiseau | 3,819.74 mi (6,147.28 km) |
| Greenbelt to Pamiers | 3,945.11 mi (6,349.04 km) |
| Greenbelt to Panazol | 3,855.05 mi (6,204.10 km) |
| Greenbelt to Pantin | 3,821.67 mi (6,150.38 km) |
| Greenbelt to Paray-le-Monial | 3,961.26 mi (6,375.03 km) |
