| Irmo to Nasaud | 5,173.67 mi (8,326.22 km) |
| Irmo to Navodari | 5,457.74 mi (8,783.38 km) |
| Irmo to Negresti-Oas | 5,113.07 mi (8,228.70 km) |
| Irmo to Nehoiu | 5,324.45 mi (8,568.88 km) |
| Irmo to Ocna Mures | 5,187.02 mi (8,347.70 km) |
| Irmo to Odobesti | 5,337.41 mi (8,589.73 km) |
| Irmo to Odorheiu Secuiesc | 5,246.59 mi (8,443.58 km) |
| Irmo to Oltenita | 5,389.16 mi (8,673.01 km) |
| Irmo to Onesti | 5,305.84 mi (8,538.92 km) |
| Irmo to Oradea | 5,084.43 mi (8,182.60 km) |
| Irmo to Orastie | 5,181.69 mi (8,339.12 km) |
| Irmo to Oravita | 5,151.33 mi (8,290.26 km) |
| Irmo to Orsova | 5,192.36 mi (8,356.30 km) |
| Irmo to Otelu Rosu | 5,160.33 mi (8,304.74 km) |
| Irmo to Otopeni | 5,347.66 mi (8,606.23 km) |
