| Ostrow Mazowiecka to Orthez | 1,219.45 mi (1,962.52 km) |
| Ostrow Mazowiecka to Orvault | 1,105.52 mi (1,779.17 km) |
| Ostrow Mazowiecka to Osny | 898.40 mi (1,445.83 km) |
| Ostrow Mazowiecka to Ostwald | 685.47 mi (1,103.16 km) |
| Ostrow Mazowiecka to Ouistreham | 988.57 mi (1,590.94 km) |
| Ostrow Mazowiecka to Oullins | 909.58 mi (1,463.82 km) |
| Ostrow Mazowiecka to Outreau | 877.50 mi (1,412.20 km) |
| Ostrow Mazowiecka to Oyonnax | 854.48 mi (1,375.16 km) |
| Ostrow Mazowiecka to Ozoir-la-Ferriere | 881.16 mi (1,418.09 km) |
| Ostrow Mazowiecka to Pace | 1,083.80 mi (1,744.20 km) |
| Ostrow Mazowiecka to Palaiseau | 900.90 mi (1,449.85 km) |
| Ostrow Mazowiecka to Pamiers | 1,146.31 mi (1,844.81 km) |
| Ostrow Mazowiecka to Panazol | 1,039.51 mi (1,672.93 km) |
| Ostrow Mazowiecka to Pantin | 889.10 mi (1,430.86 km) |
| Ostrow Mazowiecka to Paray-le-Monial | 905.24 mi (1,456.84 km) |
