| North Potomac to Orthez | 3,837.79 mi (6,176.33 km) |
| North Potomac to Orvault | 3,700.22 mi (5,954.93 km) |
| North Potomac to Osny | 3,813.62 mi (6,137.43 km) |
| North Potomac to Ostwald | 4,063.33 mi (6,539.29 km) |
| North Potomac to Ouistreham | 3,710.30 mi (5,971.15 km) |
| North Potomac to Oullins | 4,023.67 mi (6,475.47 km) |
| North Potomac to Outreau | 3,753.28 mi (6,040.32 km) |
| North Potomac to Oyonnax | 4,044.40 mi (6,508.83 km) |
| North Potomac to Ozoir-la-Ferriere | 3,846.89 mi (6,190.98 km) |
| North Potomac to Pace | 3,672.43 mi (5,910.21 km) |
| North Potomac to Palaiseau | 3,830.23 mi (6,164.16 km) |
| North Potomac to Pamiers | 3,957.42 mi (6,368.85 km) |
| North Potomac to Panazol | 3,866.56 mi (6,222.62 km) |
| North Potomac to Pantin | 3,832.08 mi (6,167.14 km) |
| North Potomac to Paray-le-Monial | 3,972.31 mi (6,392.81 km) |
