| Grefrath to Orthez | 635.41 mi (1,022.59 km) |
| Grefrath to Orvault | 455.18 mi (732.54 km) |
| Grefrath to Osny | 246.02 mi (395.93 km) |
| Grefrath to Ostwald | 201.88 mi (324.89 km) |
| Grefrath to Ouistreham | 323.88 mi (521.23 km) |
| Grefrath to Oullins | 394.65 mi (635.13 km) |
| Grefrath to Outreau | 210.85 mi (339.33 km) |
| Grefrath to Oyonnax | 352.39 mi (567.11 km) |
| Grefrath to Ozoir-la-Ferriere | 239.97 mi (386.20 km) |
| Grefrath to Pace | 423.68 mi (681.85 km) |
| Grefrath to Palaiseau | 256.55 mi (412.88 km) |
| Grefrath to Pamiers | 609.44 mi (980.80 km) |
| Grefrath to Panazol | 443.76 mi (714.16 km) |
| Grefrath to Pantin | 242.57 mi (390.38 km) |
| Grefrath to Paray-le-Monial | 352.25 mi (566.89 km) |
