| Monserrat to Opole | 1,190.01 mi (1,915.13 km) |
| Monserrat to Orzesze | 1,201.22 mi (1,933.18 km) |
| Monserrat to Osowa | 1,367.64 mi (2,201.01 km) |
| Monserrat to Ostroda | 1,382.38 mi (2,224.72 km) |
| Monserrat to Ostroleka | 1,410.86 mi (2,270.56 km) |
| Monserrat to Ostrow Mazowiecka | 1,412.60 mi (2,273.35 km) |
| Monserrat to Ostrow Wielkopolski | 1,225.09 mi (1,971.59 km) |
| Monserrat to Ostrowiec Swietokrzyski | 1,329.10 mi (2,138.99 km) |
| Monserrat to Ostrzeszow | 1,219.63 mi (1,962.81 km) |
| Monserrat to Oswiecim | 1,215.34 mi (1,955.90 km) |
| Monserrat to Otwock | 1,365.04 mi (2,196.83 km) |
| Monserrat to Ozarow Mazowiecki | 1,351.95 mi (2,175.76 km) |
| Monserrat to Ozimek | 1,200.45 mi (1,931.94 km) |
| Monserrat to Ozorkow | 1,288.78 mi (2,074.09 km) |
| Monserrat to Pabianice | 1,280.01 mi (2,059.98 km) |
