| South Portland to Orthez | 3,372.16 mi (5,426.97 km) |
| South Portland to Orvault | 3,228.23 mi (5,195.33 km) |
| South Portland to Osny | 3,338.35 mi (5,372.55 km) |
| South Portland to Ostwald | 3,587.21 mi (5,773.05 km) |
| South Portland to Ouistreham | 3,235.38 mi (5,206.84 km) |
| South Portland to Oullins | 3,551.14 mi (5,715.01 km) |
| South Portland to Outreau | 3,276.89 mi (5,273.64 km) |
| South Portland to Oyonnax | 3,570.87 mi (5,746.76 km) |
| South Portland to Ozoir-la-Ferriere | 3,371.72 mi (5,426.27 km) |
| South Portland to Pace | 3,199.26 mi (5,148.71 km) |
| South Portland to Palaiseau | 3,355.23 mi (5,399.72 km) |
| South Portland to Pamiers | 3,490.88 mi (5,618.02 km) |
| South Portland to Panazol | 3,395.45 mi (5,464.44 km) |
| South Portland to Pantin | 3,356.87 mi (5,402.37 km) |
| South Portland to Paray-le-Monial | 3,499.14 mi (5,631.32 km) |
