| Dublin to Navodari | 1,683.65 mi (2,709.58 km) |
| Dublin to Negresti-Oas | 1,344.51 mi (2,163.78 km) |
| Dublin to Nehoiu | 1,549.99 mi (2,494.47 km) |
| Dublin to Ocna Mures | 1,412.28 mi (2,272.85 km) |
| Dublin to Odobesti | 1,565.98 mi (2,520.20 km) |
| Dublin to Odorheiu Secuiesc | 1,473.99 mi (2,372.17 km) |
| Dublin to Oltenita | 1,612.28 mi (2,594.71 km) |
| Dublin to Onesti | 1,536.17 mi (2,472.22 km) |
| Dublin to Oradea | 1,309.23 mi (2,107.00 km) |
| Dublin to Orastie | 1,404.94 mi (2,261.04 km) |
| Dublin to Oravita | 1,374.62 mi (2,212.23 km) |
| Dublin to Orsova | 1,415.61 mi (2,278.20 km) |
| Dublin to Otelu Rosu | 1,383.01 mi (2,225.74 km) |
| Dublin to Otopeni | 1,571.02 mi (2,528.32 km) |
| Dublin to Ovidiu | 1,683.46 mi (2,709.27 km) |
