| Somain to Orthez | 511.48 mi (823.16 km) |
| Somain to Orvault | 308.45 mi (496.40 km) |
| Somain to Osny | 104.91 mi (168.84 km) |
| Somain to Ostwald | 234.94 mi (378.10 km) |
| Somain to Ouistreham | 174.43 mi (280.73 km) |
| Somain to Oullins | 328.42 mi (528.54 km) |
| Somain to Outreau | 77.84 mi (125.26 km) |
| Somain to Oyonnax | 303.64 mi (488.65 km) |
| Somain to Ozoir-la-Ferriere | 112.40 mi (180.89 km) |
| Somain to Pace | 274.25 mi (441.37 km) |
| Somain to Palaiseau | 122.63 mi (197.35 km) |
| Somain to Pamiers | 506.48 mi (815.11 km) |
| Somain to Panazol | 325.14 mi (523.27 km) |
| Somain to Pantin | 108.33 mi (174.33 km) |
| Somain to Paray-le-Monial | 272.63 mi (438.76 km) |
