| Ahlen to Navodari | 1,081.27 mi (1,740.13 km) |
| Ahlen to Negresti-Oas | 741.12 mi (1,192.71 km) |
| Ahlen to Nehoiu | 947.74 mi (1,525.25 km) |
| Ahlen to Ocna Mures | 810.15 mi (1,303.82 km) |
| Ahlen to Odobesti | 962.75 mi (1,549.40 km) |
| Ahlen to Odorheiu Secuiesc | 870.97 mi (1,401.69 km) |
| Ahlen to Oltenita | 1,012.73 mi (1,629.83 km) |
| Ahlen to Onesti | 932.75 mi (1,501.12 km) |
| Ahlen to Oradea | 707.43 mi (1,138.50 km) |
| Ahlen to Orastie | 805.28 mi (1,295.97 km) |
| Ahlen to Oravita | 782.86 mi (1,259.89 km) |
| Ahlen to Orsova | 823.36 mi (1,325.07 km) |
| Ahlen to Otelu Rosu | 786.57 mi (1,265.86 km) |
| Ahlen to Otopeni | 970.98 mi (1,562.64 km) |
| Ahlen to Ovidiu | 1,081.19 mi (1,740.02 km) |
