| Niederkassel to Orthez | 624.44 mi (1,004.94 km) |
| Niederkassel to Orvault | 461.80 mi (743.19 km) |
| Niederkassel to Osny | 252.13 mi (405.77 km) |
| Niederkassel to Ostwald | 159.46 mi (256.63 km) |
| Niederkassel to Ouistreham | 340.34 mi (547.72 km) |
| Niederkassel to Oullins | 367.00 mi (590.63 km) |
| Niederkassel to Outreau | 237.81 mi (382.72 km) |
| Niederkassel to Oyonnax | 321.33 mi (517.14 km) |
| Niederkassel to Ozoir-la-Ferriere | 239.80 mi (385.93 km) |
| Niederkassel to Pace | 435.87 mi (701.46 km) |
| Niederkassel to Palaiseau | 258.28 mi (415.66 km) |
| Niederkassel to Pamiers | 589.89 mi (949.34 km) |
| Niederkassel to Panazol | 432.64 mi (696.26 km) |
| Niederkassel to Pantin | 245.22 mi (394.64 km) |
| Niederkassel to Paray-le-Monial | 329.61 mi (530.45 km) |
