| Illingen to Navodari | 1,072.63 mi (1,726.24 km) |
| Illingen to Negresti-Oas | 753.41 mi (1,212.49 km) |
| Illingen to Nehoiu | 939.90 mi (1,512.62 km) |
| Illingen to Ocna Mures | 803.79 mi (1,293.58 km) |
| Illingen to Odobesti | 962.53 mi (1,549.05 km) |
| Illingen to Odorheiu Secuiesc | 869.92 mi (1,400.00 km) |
| Illingen to Oltenita | 993.29 mi (1,598.55 km) |
| Illingen to Onesti | 936.86 mi (1,507.73 km) |
| Illingen to Oradea | 701.43 mi (1,128.85 km) |
| Illingen to Orastie | 788.78 mi (1,269.43 km) |
| Illingen to Oravita | 747.72 mi (1,203.35 km) |
| Illingen to Orsova | 788.72 mi (1,269.32 km) |
| Illingen to Otelu Rosu | 761.33 mi (1,225.24 km) |
| Illingen to Otopeni | 953.57 mi (1,534.63 km) |
| Illingen to Ovidiu | 1,071.87 mi (1,725.00 km) |
