| Olesa de Montserrat to Opole | 990.08 mi (1,593.37 km) |
| Olesa de Montserrat to Orzesze | 1,001.98 mi (1,612.53 km) |
| Olesa de Montserrat to Osowa | 1,168.74 mi (1,880.90 km) |
| Olesa de Montserrat to Ostroda | 1,182.45 mi (1,902.96 km) |
| Olesa de Montserrat to Ostroleka | 1,210.67 mi (1,948.38 km) |
| Olesa de Montserrat to Ostrow Mazowiecka | 1,212.46 mi (1,951.27 km) |
| Olesa de Montserrat to Ostrow Wielkopolski | 1,024.89 mi (1,649.40 km) |
| Olesa de Montserrat to Ostrowiec Swietokrzyski | 1,130.03 mi (1,818.60 km) |
| Olesa de Montserrat to Ostrzeszow | 1,019.45 mi (1,640.65 km) |
| Olesa de Montserrat to Oswiecim | 1,016.42 mi (1,635.77 km) |
| Olesa de Montserrat to Otwock | 1,165.05 mi (1,874.97 km) |
| Olesa de Montserrat to Ozarow Mazowiecki | 1,151.86 mi (1,853.74 km) |
| Olesa de Montserrat to Ozimek | 1,000.59 mi (1,610.29 km) |
| Olesa de Montserrat to Ozorkow | 1,088.61 mi (1,751.94 km) |
| Olesa de Montserrat to Pabianice | 1,079.92 mi (1,737.96 km) |
