| Ostrow Wielkopolski to Orthez | 1,029.25 mi (1,656.42 km) |
| Ostrow Wielkopolski to Orvault | 920.57 mi (1,481.52 km) |
| Ostrow Wielkopolski to Osny | 715.62 mi (1,151.68 km) |
| Ostrow Wielkopolski to Ostwald | 495.73 mi (797.79 km) |
| Ostrow Wielkopolski to Ouistreham | 809.43 mi (1,302.65 km) |
| Ostrow Wielkopolski to Oullins | 719.62 mi (1,158.12 km) |
| Ostrow Wielkopolski to Outreau | 704.26 mi (1,133.39 km) |
| Ostrow Wielkopolski to Oyonnax | 664.48 mi (1,069.38 km) |
| Ostrow Wielkopolski to Ozoir-la-Ferriere | 696.57 mi (1,121.03 km) |
| Ostrow Wielkopolski to Pace | 901.74 mi (1,451.21 km) |
| Ostrow Wielkopolski to Palaiseau | 716.55 mi (1,153.17 km) |
| Ostrow Wielkopolski to Pamiers | 956.80 mi (1,539.82 km) |
| Ostrow Wielkopolski to Panazol | 849.81 mi (1,367.64 km) |
| Ostrow Wielkopolski to Pantin | 705.27 mi (1,135.02 km) |
| Ostrow Wielkopolski to Paray-le-Monial | 715.09 mi (1,150.82 km) |
