| Alfter to Navodari | 1,095.84 mi (1,763.59 km) |
| Alfter to Negresti-Oas | 763.82 mi (1,229.25 km) |
| Alfter to Nehoiu | 962.21 mi (1,548.53 km) |
| Alfter to Ocna Mures | 824.66 mi (1,327.16 km) |
| Alfter to Odobesti | 980.82 mi (1,578.47 km) |
| Alfter to Odorheiu Secuiesc | 888.25 mi (1,429.50 km) |
| Alfter to Oltenita | 1,022.01 mi (1,644.77 km) |
| Alfter to Onesti | 952.69 mi (1,533.21 km) |
| Alfter to Oradea | 721.45 mi (1,161.06 km) |
| Alfter to Orastie | 815.01 mi (1,311.63 km) |
| Alfter to Oravita | 783.62 mi (1,261.11 km) |
| Alfter to Orsova | 824.58 mi (1,327.04 km) |
| Alfter to Otelu Rosu | 792.06 mi (1,274.70 km) |
| Alfter to Otopeni | 981.06 mi (1,578.86 km) |
| Alfter to Ovidiu | 1,095.45 mi (1,762.95 km) |
