| Dublin to Orzesze | 1,086.48 mi (1,748.52 km) |
| Dublin to Osowa | 1,004.60 mi (1,616.75 km) |
| Dublin to Ostroda | 1,071.39 mi (1,724.24 km) |
| Dublin to Ostroleka | 1,144.35 mi (1,841.65 km) |
| Dublin to Ostrow Mazowiecka | 1,161.93 mi (1,869.95 km) |
| Dublin to Ostrow Wielkopolski | 1,014.59 mi (1,632.83 km) |
| Dublin to Ostrowiec Swietokrzyski | 1,177.12 mi (1,894.40 km) |
| Dublin to Ostrzeszow | 1,023.99 mi (1,647.95 km) |
| Dublin to Oswiecim | 1,108.75 mi (1,784.36 km) |
| Dublin to Otwock | 1,147.64 mi (1,846.94 km) |
| Dublin to Ozarow Mazowiecki | 1,126.74 mi (1,813.32 km) |
| Dublin to Ozimek | 1,051.67 mi (1,692.50 km) |
| Dublin to Ozorkow | 1,069.01 mi (1,720.40 km) |
| Dublin to Pabianice | 1,079.08 mi (1,736.60 km) |
| Dublin to Parczew | 1,222.48 mi (1,967.39 km) |
